$argd 2024 Q1 10-K

Concept	2024 Q1	2023 Q4	2022 Q4
Revenue	$378.7M	$190.6M	$383.7M
YoY Change	-5.73%	-50.33%	-27.7%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$2.300M	$3.500M
YoY Change		-34.29%	-76.51%
% of Gross Profit
Operating Expenses			$502.4M
YoY Change			-18.68%
Operating Profit
YoY Change
Interest Expense	$8.700M	$3.500M	-$19.60M
YoY Change	2.35%	-117.86%	684.0%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$27.20M	$2.200M	-$138.3M
YoY Change	-164.3%	-101.59%	4.14%
Income Tax	$1.600M	$1.300M	-$29.10M
% Of Pretax Income	5.88%	59.09%
Net Earnings	$25.60M	$900.0K	-$111.8M
YoY Change	-175.74%	-100.81%	-3.04%
Net Earnings / Revenue	6.76%	0.47%	-29.14%
Basic Earnings Per Share
Diluted Earnings Per Share			-$3.19
COMMON SHARES
Basic Shares Outstanding	1.057B shares	35.22M shares	35.06M shares
Diluted Shares Outstanding

Concept	2024 Q1	2023 Q4	2022 Q4
OPERATING ACTIVITIES
Net Income	$25.60M	$900.0K	-$111.8M
YoY Change	-175.74%	-100.81%	-3.04%
Depreciation, Depletion And Amortization		$2.300M	$3.500M
YoY Change		-34.29%	-76.51%
Cash From Operating Activities	-$13.70M	$16.90M	-$117.1M
YoY Change	-135.04%	-114.43%	-298.81%
INVESTING ACTIVITIES
Capital Expenditures			$3.800M
YoY Change
Acquisitions
YoY Change
Other Investing Activities		$0.00	$83.30M
YoY Change		-100.0%	-178.22%
Cash From Investing Activities	-$512.9M	$61.80M	$79.50M
YoY Change	321.79%	-22.26%	-174.65%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$197.4M	$0.00	-13.80M
YoY Change	-9500.0%	-100.0%	2.22%
NET CHANGE
Cash From Operating Activities	-$13.70M	$16.90M	-117.1M
Cash From Investing Activities	-$512.9M	$61.80M	79.50M
Cash From Financing Activities	$197.4M	$0.00	-13.80M
Net Change In Cash	-$329.2M	$78.70M	-51.40M
YoY Change	289.13%	-253.11%	-15.88%
FREE CASH FLOW
Cash From Operating Activities	-$13.70M	$16.90M	-$117.1M
Capital Expenditures			$3.800M
Free Cash Flow			-$120.9M
YoY Change

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001091748
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2022Q4	us-gaap	Investments Investments	3651900000	usd
CY2022Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2023	argo	Claims Remain Outstanding Period ClaimsRemainOutstandingPeriod	P10Y
CY2023Q4	argo	Depository Shares Fractional Interest Per Preference Share DepositorySharesFractionalInterestPerPreferenceShare	0.001
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	1-15259
CY2023	dei	Entity Registrant Name EntityRegistrantName	ARGO GROUP INTERNATIONAL HOLDINGS, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0214719
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	501 7th Avenue 7th Floor
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10018
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2023	dei	City Area Code CityAreaCode	210
CY2023	dei	Local Phone Number LocalPhoneNumber	321-8400
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	1037700000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1056638730	shares
CY2023	dei	Auditor Firm AuditorFirmId	185
CY2023	dei	Auditor Name AuditorName	KPMG LLP
CY2023	dei	Auditor Location AuditorLocation	New York, New York
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	2521500000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	3016400000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	200000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	2800000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2585400000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2675500000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	144800000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	159900000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	200000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	200000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	144600000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	159700000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	11700000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	54700000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	10700000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	43900000	usd
CY2023Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	311000000.0	usd
CY2022Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	323200000	usd
CY2023Q4	us-gaap	Other Investments OtherInvestments	311000000.0	usd
CY2022Q4	us-gaap	Other Investments OtherInvestments	323200000	usd
CY2023Q4	argo	Short Term Investments Amortized Cost ShortTermInvestmentsAmortizedCost	429000000.0	usd
CY2022Q4	argo	Short Term Investments Amortized Cost ShortTermInvestmentsAmortizedCost	449400000	usd
CY2023Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	429500000	usd
CY2022Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	449600000	usd
CY2023Q4	us-gaap	Investments Investments	3481200000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	791600000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	50200000	usd
CY2023Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	20400000	usd
CY2022Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	18600000	usd
CY2023Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	230700000	usd
CY2022Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	292000000.0	usd
CY2023Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2959300000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	3029100000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	0	usd
CY2022Q4	us-gaap	Goodwill Goodwill	118600000	usd
CY2023Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	180600000	usd
CY2022Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	0	usd
CY2023Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	53100000	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	44900000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	39100000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	101200000	usd
CY2023Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	7200000	usd
CY2022Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	107000000.0	usd
CY2023Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	356000000.0	usd
CY2022Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	375500000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	51200000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	57700000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	189100000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	121500000	usd
CY2023Q4	us-gaap	Value Of Business Acquired Voba ValueOfBusinessAcquiredVOBA	143600000	usd
CY2022Q4	us-gaap	Value Of Business Acquired Voba ValueOfBusinessAcquiredVOBA	0	usd
CY2023Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	0	usd
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CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5544500000	usd
CY2022Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5051600000	usd
CY2023Q4	us-gaap	Unearned Premiums UnearnedPremiums	916600000	usd
CY2022Q4	us-gaap	Unearned Premiums UnearnedPremiums	1039900000	usd
CY2023Q4	argo	Accrued Underwriting Expenses And Other Liabilities AccruedUnderwritingExpensesAndOtherLiabilities	73900000	usd
CY2022Q4	argo	Accrued Underwriting Expenses And Other Liabilities AccruedUnderwritingExpensesAndOtherLiabilities	121300000	usd
CY2023Q4	us-gaap	Reinsurance Payable ReinsurancePayable	192700000	usd
CY2022Q4	us-gaap	Reinsurance Payable ReinsurancePayable	158700000	usd
CY2023Q4	us-gaap	Policyholder Contract Deposits PolicyholderContractDeposits	57300000	usd
CY2022Q4	us-gaap	Policyholder Contract Deposits PolicyholderContractDeposits	50000000.0	usd
CY2023Q4	us-gaap	Senior Notes SeniorNotes	128000000.0	usd
CY2022Q4	us-gaap	Senior Notes SeniorNotes	140500000	usd
CY2023Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	241200000	usd
CY2022Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	258600000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	51400000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	66400000	usd
CY2023Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	0	usd
CY2022Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	1914500000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	7205600000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	8801500000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	6000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	6000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	6000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	6000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	6000	shares
CY2023Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	25000
CY2022Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	25000
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	137100000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	144000000.0	usd
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CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
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CY2023Q4	us-gaap	Common Stock Value CommonStockValue	1056600000	usd
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CY2022	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	1166900000	usd
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CY2023Q4	argo	Underwriting Acquisition And Insurance Expenses UnderwritingAcquisitionAndInsuranceExpenses	77200000	usd
	argo	Underwriting Acquisition And Insurance Expenses UnderwritingAcquisitionAndInsuranceExpenses	419000000.0	usd
CY2022	argo	Underwriting Acquisition And Insurance Expenses UnderwritingAcquisitionAndInsuranceExpenses	670700000	usd
CY2021	argo	Underwriting Acquisition And Insurance Expenses UnderwritingAcquisitionAndInsuranceExpenses	702300000	usd
CY2023Q4	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	13100000	usd
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CY2022	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	51500000	usd
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CY2023Q4	us-gaap	Interest Expense InterestExpense	3500000	usd
	us-gaap	Interest Expense InterestExpense	29800000	usd
CY2022	us-gaap	Interest Expense InterestExpense	26800000	usd
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CY2023Q4	argo	Fee And Other Income Expense Net FeeAndOtherIncomeExpenseNet	-200000	usd
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CY2023Q4	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-600000	usd
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CY2022	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1938100000	usd
CY2021	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2125000000	usd
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	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-210100000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-183200000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5300000	usd
CY2023Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8000000.0	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1400000	usd
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	us-gaap	Net Income Loss NetIncomeLoss	-210400000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-175200000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	6700000	usd
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CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	10500000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	10500000	usd
CY2023Q4	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	900000	usd
CY2023Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	900000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-220900000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-220900000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-185700000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-185700000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-3800000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-3800000	usd
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CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.31
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.11
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.28
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.31
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.11
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35166679	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34980608	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34816160	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35166679	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34980608	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34816160	shares
CY2023Q4	us-gaap	Financial Designation Predecessor And Successor Fixed List FinancialDesignationPredecessorAndSuccessorFixedList	Successor
CY2023Q4	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	-300000	usd
	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	-19800000	usd
CY2022	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	-79200000	usd
CY2021	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	32600000	usd
CY2023Q4	argo	Other Than Temporary Impairment Losses Fixed Maturities OtherThanTemporaryImpairmentLossesFixedMaturities	0	usd
	argo	Other Than Temporary Impairment Losses Fixed Maturities OtherThanTemporaryImpairmentLossesFixedMaturities	2900000	usd
CY2022	argo	Other Than Temporary Impairment Losses Fixed Maturities OtherThanTemporaryImpairmentLossesFixedMaturities	36100000	usd
CY2021	argo	Other Than Temporary Impairment Losses Fixed Maturities OtherThanTemporaryImpairmentLossesFixedMaturities	0	usd
CY2023Q4	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	usd
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	2900000	usd
CY2022	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	36100000	usd
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-115300000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	32600000	usd
CY2023Q4	us-gaap	Financial Designation Predecessor And Successor Fixed List FinancialDesignationPredecessorAndSuccessorFixedList	Successor
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	900000	usd
	us-gaap	Net Income Loss NetIncomeLoss	-210400000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-175200000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	6700000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	100000	usd
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	1000000.0	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-700000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	2600000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	usd
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	-31800000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	800000	usd
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CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-900000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	1900000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	64700000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	15200000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-428100000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-94700000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	100000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-28000000.0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-43600000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	12200000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	65500000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	45200000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-354300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-102400000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-200000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-200000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	200000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-400000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	13500000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1500000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-80900000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-17300000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-5900000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-9200000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	4200000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	13700000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	7600000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-71900000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-21100000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	51800000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	37600000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-282400000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-81300000	usd
CY2023Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	52700000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-172800000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-457600000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-74600000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1857800000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	6700000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-85400000	usd
CY2021	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	4100000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	7100000	usd
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2800000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2100000	usd
CY2021	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	10500000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	43900000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1735200000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-175200000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-312800000	usd
CY2022	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	30400000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	9600000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1800000	usd
CY2022	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	10500000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	43400000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1232900000	usd
	us-gaap	Net Income Loss NetIncomeLoss	-210400000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	35800000	usd
	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	1800000	usd
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-600000	usd
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	900000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1500000	usd
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	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.00
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	-300000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1049900000	usd
CY2023Q4	us-gaap	Financial Designation Predecessor And Successor Fixed List FinancialDesignationPredecessorAndSuccessorFixedList	Successor
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1244800000	usd
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	900000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	51100000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Other Net Of Tax OtherComprehensiveIncomeOtherNetOfTax	700000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1297500000	usd
CY2023Q4	us-gaap	Financial Designation Predecessor And Successor Fixed List FinancialDesignationPredecessorAndSuccessorFixedList	Successor
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	900000	usd
	us-gaap	Net Income Loss NetIncomeLoss	-210400000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-175200000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	6700000	usd
CY2023Q4	us-gaap	Depreciation And Amortization DepreciationAndAmortization	39600000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	12200000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	18500000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	43400000	usd
CY2023Q4	us-gaap	Share Based Compensation ShareBasedCompensation	0	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1500000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	9600000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	8000000.0	usd
CY2023Q4	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1300000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-14900000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15400000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-38600000	usd
CY2023Q4	us-gaap	Gain Loss On Investments GainLossOnInvestments	-300000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-22700000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-115300000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	32600000	usd
CY2023Q4	argo	Undistributed Earnings From Alternative Investment Portfolio UndistributedEarningsFromAlternativeInvestmentPortfolio	-2200000	usd
	argo	Undistributed Earnings From Alternative Investment Portfolio UndistributedEarningsFromAlternativeInvestmentPortfolio	-11500000	usd
CY2022	argo	Undistributed Earnings From Alternative Investment Portfolio UndistributedEarningsFromAlternativeInvestmentPortfolio	-17700000	usd
CY2021	argo	Undistributed Earnings From Alternative Investment Portfolio UndistributedEarningsFromAlternativeInvestmentPortfolio	-95500000	usd
CY2023Q4	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	usd
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-1200000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-600000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-23300000	usd
CY2023Q4	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-600000	usd
	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-1800000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	0	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	0	usd
CY2023Q4	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	28500000	usd
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	43200000	usd
CY2023Q4	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	3300000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1400000	usd
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-200000	usd
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-800000	usd
CY2023Q4	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-98500000	usd
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-614300000	usd
CY2022	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	193600000	usd
CY2021	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-47400000	usd
CY2023Q4	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	7200000	usd
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-8800000	usd
CY2022	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	12600000	usd
CY2021	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-800000	usd
CY2023Q4	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-31600000	usd
	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	69700000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-88400000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-65700000	usd
CY2023Q4	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	17200000	usd
	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	-27900000	usd
CY2022	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	446200000	usd
CY2021	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	210800000	usd
CY2023Q4	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-69600000	usd
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-12000000.0	usd
CY2022	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-74700000	usd
CY2021	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	7200000	usd
CY2023Q4	argo	Increase Decrease In Reinsurance Payables And Funds Held IncreaseDecreaseInReinsurancePayablesAndFundsHeld	-57300000	usd
	argo	Increase Decrease In Reinsurance Payables And Funds Held IncreaseDecreaseInReinsurancePayablesAndFundsHeld	20100000	usd
CY2022	argo	Increase Decrease In Reinsurance Payables And Funds Held IncreaseDecreaseInReinsurancePayablesAndFundsHeld	-162900000	usd
CY2021	argo	Increase Decrease In Reinsurance Payables And Funds Held IncreaseDecreaseInReinsurancePayablesAndFundsHeld	-207300000	usd
CY2023Q4	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	100000	usd
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	14600000	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-47500000	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-4500000	usd
CY2023Q4	argo	Increase Decrease In Accrued Underwriting Expenses IncreaseDecreaseInAccruedUnderwritingExpenses	-19300000	usd
	argo	Increase Decrease In Accrued Underwriting Expenses IncreaseDecreaseInAccruedUnderwritingExpenses	18700000	usd
CY2022	argo	Increase Decrease In Accrued Underwriting Expenses IncreaseDecreaseInAccruedUnderwritingExpenses	14700000	usd
CY2021	argo	Increase Decrease In Accrued Underwriting Expenses IncreaseDecreaseInAccruedUnderwritingExpenses	3000000.0	usd
CY2023Q4	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	14300000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	77200000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	0	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-17900000	usd
CY2023Q4	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	16900000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	293700000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	53200000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	99700000	usd
CY2023Q4	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	700000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	24200000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	818500000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	992900000	usd
CY2023Q4	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	22300000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	139300000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	380100000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	717700000	usd
CY2023Q4	argo	Proceedsfrom Sale And Maturity Of Equity Securities Fvni ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI	0	usd
	argo	Proceedsfrom Sale And Maturity Of Equity Securities Fvni ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI	45700000	usd
CY2022	argo	Proceedsfrom Sale And Maturity Of Equity Securities Fvni ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI	17800000	usd
CY2021	argo	Proceedsfrom Sale And Maturity Of Equity Securities Fvni ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI	125800000	usd
CY2023Q4	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	22200000	usd
	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	24000000.0	usd
CY2022	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	58100000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	212300000	usd
CY2023Q4	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	10100000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	11900000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1093600000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1932900000	usd
CY2023Q4	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	0	usd
	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	300000	usd
CY2022	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	1000000.0	usd
CY2021	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	5300000	usd
CY2023Q4	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2900000	usd
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	19300000	usd
CY2022	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	52800000	usd
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	47400000	usd
CY2023Q4	argo	Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools	0	usd
	argo	Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools	0	usd
CY2022	argo	Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools	6700000	usd
CY2021	argo	Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools	27100000	usd
CY2023Q4	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	0	usd
	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	0	usd
CY2022	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	159900000	usd
CY2021	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	0	usd
CY2023Q4	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-24100000	usd
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	627000000.0	usd
CY2022	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-26100000	usd
CY2021	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	116400000	usd
CY2023Q4	argo	Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts	1300000	usd
	argo	Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts	4500000	usd
CY2022	argo	Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts	-22000000.0	usd
CY2021	argo	Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts	-1200000	usd
CY2023Q4	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	4200000	usd
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	63800000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	14900000	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	usd
CY2023Q4	argo	Payments For Proceeds From Property Plant And Equipment PaymentsForProceedsFromPropertyPlantAndEquipment	0	usd
	argo	Payments For Proceeds From Property Plant And Equipment PaymentsForProceedsFromPropertyPlantAndEquipment	-2700000	usd
CY2022	argo	Payments For Proceeds From Property Plant And Equipment PaymentsForProceedsFromPropertyPlantAndEquipment	-6100000	usd
CY2021	argo	Payments For Proceeds From Property Plant And Equipment PaymentsForProceedsFromPropertyPlantAndEquipment	18000000.0	usd
CY2023Q4	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	usd
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-7700000	usd
CY2023Q4	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	61800000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-359700000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-26600000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-55900000	usd
CY2023Q4	us-gaap	Financial Designation Predecessor And Successor Fixed List FinancialDesignationPredecessorAndSuccessorFixedList	Successor
CY2023Q4	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	0	usd
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	700000	usd
CY2022	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	1800000	usd
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	1300000	usd

CY2023

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

CY2023

dei

Entity Interactive Data Current

EntityInteractiveDataCurrent

Yes

CY2023

dei

Entity Filer Category

EntityFilerCategory

Non-accelerated Filer

CY2023

dei

Entity Small Business

EntitySmallBusiness

false

CY2023

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Entity Emerging Growth Company

EntityEmergingGrowthCompany

false

CY2023

dei

Entity Central Index Key

EntityCentralIndexKey

0001091748

CY2023

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Document Fiscal Year Focus

DocumentFiscalYearFocus

2023

CY2023

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

FY

CY2023

dei

Amendment Flag

AmendmentFlag

false

CY2022Q4

us-gaap

Investments

3651900000

usd

CY2022Q4

us-gaap

Derivative Asset Statement Of Financial Position Extensible Enumeration

DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration

http://fasb.org/us-gaap/2023#OtherAssets

CY2023Q4

us-gaap

Derivative Asset Statement Of Financial Position Extensible Enumeration

DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration

http://fasb.org/us-gaap/2023#OtherAssets

CY2023

argo

Claims Remain Outstanding Period

ClaimsRemainOutstandingPeriod

P10Y

CY2023Q4

argo

Depository Shares Fractional Interest Per Preference Share

DepositorySharesFractionalInterestPerPreferenceShare

0.001

CY2023

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Document Annual Report

DocumentAnnualReport

true

CY2023

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Document Period End Date

DocumentPeriodEndDate

2023-12-31

CY2023

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Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

CY2023

dei

Document Transition Report

DocumentTransitionReport

false

CY2023

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Entity File Number

EntityFileNumber

1-15259

CY2023

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Entity Registrant Name

EntityRegistrantName

ARGO GROUP INTERNATIONAL HOLDINGS, INC.

CY2023

dei

Entity Incorporation State Country Code

EntityIncorporationStateCountryCode

DE

CY2023

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Entity Tax Identification Number

EntityTaxIdentificationNumber

98-0214719

CY2023

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Entity Address Address Line1

EntityAddressAddressLine1

501 7th Avenue 7th Floor

CY2023

dei

Entity Address City Or Town

EntityAddressCityOrTown

New York

CY2023

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Entity Address Postal Zip Code

EntityAddressPostalZipCode

10018

CY2023

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Entity Address State Or Province

EntityAddressStateOrProvince

NY

CY2023

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City Area Code

CityAreaCode

210

CY2023

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Local Phone Number

LocalPhoneNumber

321-8400

CY2023

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Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

No

CY2023

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Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2023

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Icfr Auditor Attestation Flag

IcfrAuditorAttestationFlag

false

CY2023

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Document Fin Stmt Error Correction Flag

DocumentFinStmtErrorCorrectionFlag

false

CY2023

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Entity Shell Company

EntityShellCompany

false

CY2023Q2

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Entity Public Float

EntityPublicFloat

1037700000

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CY2024Q1

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Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

1056638730

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CY2023

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Auditor Firm

AuditorFirmId

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CY2023

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Auditor Name

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KPMG LLP

CY2023

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Auditor Location

AuditorLocation

New York, New York

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss

DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss

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CY2022Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss

DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss

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CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

200000

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CY2022Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

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CY2023Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest

DebtSecuritiesAvailableForSaleExcludingAccruedInterest

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CY2022Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest

DebtSecuritiesAvailableForSaleExcludingAccruedInterest

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CY2023Q4

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Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

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CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

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CY2023Q4

us-gaap

Financing Receivable Allowance For Credit Loss Excluding Accrued Interest

FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest

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CY2022Q4

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Financing Receivable Allowance For Credit Loss Excluding Accrued Interest

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CY2023Q4

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Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss

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Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss

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Equity Securities Fv Ni Cost

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Equity Securities Fv Ni Cost

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Equity Securities Fv Ni

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Equity Securities Fv Ni

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Other Investments And Securities At Cost

OtherInvestmentsAndSecuritiesAtCost

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CY2022Q4

us-gaap

Other Investments And Securities At Cost

OtherInvestmentsAndSecuritiesAtCost

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CY2023Q4

us-gaap

Other Investments

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CY2022Q4

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Other Investments

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CY2023Q4

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Short Term Investments Amortized Cost

ShortTermInvestmentsAmortizedCost

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CY2022Q4

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Short Term Investments Amortized Cost

ShortTermInvestmentsAmortizedCost

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CY2023Q4

us-gaap

Other Short Term Investments

OtherShortTermInvestments

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CY2022Q4

us-gaap

Other Short Term Investments

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us-gaap

Investments

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CY2023Q4

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Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

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CY2022Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

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CY2023Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

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CY2022Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

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CY2023Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

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CY2022Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

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CY2023Q4

us-gaap

Reinsurance Recoverables On Paid And Unpaid Losses

ReinsuranceRecoverablesOnPaidAndUnpaidLosses

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us-gaap

Reinsurance Recoverables On Paid And Unpaid Losses

ReinsuranceRecoverablesOnPaidAndUnpaidLosses

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Goodwill

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CY2022Q4

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Goodwill

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CY2023Q4

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us-gaap

Other Intangible Assets Net

OtherIntangibleAssetsNet

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CY2023Q4

us-gaap

Income Tax Receivable

IncomeTaxReceivable

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CY2022Q4

us-gaap

Income Tax Receivable

IncomeTaxReceivable

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CY2023Q4

us-gaap

Deferred Income Tax Assets Net

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CY2022Q4

us-gaap

Deferred Income Tax Assets Net

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CY2023Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

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Deferred Policy Acquisition Costs

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Prepaid Reinsurance Premiums

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us-gaap

Prepaid Reinsurance Premiums

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Operating Lease Right Of Use Asset

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CY2023Q4

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Other Assets

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CY2022Q4

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Other Assets

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CY2023Q4

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Value Of Business Acquired Voba

ValueOfBusinessAcquiredVOBA

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Value Of Business Acquired Voba

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Assets

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Assets

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Liability For Claims And Claims Adjustment Expense

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us-gaap

Unearned Premiums

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CY2022Q4

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argo

Accrued Underwriting Expenses And Other Liabilities

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argo

Accrued Underwriting Expenses And Other Liabilities

AccruedUnderwritingExpensesAndOtherLiabilities

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CY2023Q4

us-gaap

Reinsurance Payable

ReinsurancePayable

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CY2022Q4

us-gaap

Reinsurance Payable

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CY2023Q4

us-gaap

Policyholder Contract Deposits

PolicyholderContractDeposits

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CY2022Q4

us-gaap

Policyholder Contract Deposits

PolicyholderContractDeposits

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CY2023Q4

us-gaap

Senior Notes

SeniorNotes

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CY2022Q4

us-gaap

Senior Notes

SeniorNotes

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CY2023Q4

us-gaap

Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust

JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust

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CY2022Q4

us-gaap

Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust

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CY2023Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

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CY2022Q4

us-gaap

Operating Lease Liability

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us-gaap

Liabilities Of Disposal Group Including Discontinued Operation

LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

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usd

CY2022Q4

us-gaap

Liabilities Of Disposal Group Including Discontinued Operation

LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

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CY2023Q4

us-gaap

Liabilities

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usd

CY2022Q4

us-gaap

Liabilities

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CY2023Q4

us-gaap

Commitments And Contingencies

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CY2022Q4

us-gaap

Commitments And Contingencies

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us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

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CY2022Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

1.00

CY2022Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

30000000

shares

CY2023Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

30000000

shares

CY2023Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

6000

shares

CY2022Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

6000

shares

CY2022Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

6000

shares

CY2023Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

6000

shares

CY2022Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

6000

shares

CY2023Q4

us-gaap

Preferred Stock Liquidation Preference

PreferredStockLiquidationPreference

25000

CY2022Q4

us-gaap

Preferred Stock Liquidation Preference

PreferredStockLiquidationPreference

25000

CY2023Q4

us-gaap

Preferred Stock Value

PreferredStockValue

137100000

usd

CY2022Q4

us-gaap

Preferred Stock Value

PreferredStockValue

144000000.0

usd

CY2023Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1.00

CY2022Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1.00

CY2023Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

2000000000

shares

CY2022Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

500000000

shares

CY2023Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

1056638730

shares

CY2022Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

46379297

shares

CY2023Q4

us-gaap

Common Stock Value

CommonStockValue

1056600000

usd

CY2022Q4

us-gaap

Common Stock Value

CommonStockValue

46400000

usd

CY2023Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

51100000

usd

CY2022Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

1395400000

usd

CY2023Q4

us-gaap

Treasury Stock Common Shares

TreasuryStockCommonShares

0

shares

CY2022Q4

us-gaap

Treasury Stock Common Shares

TreasuryStockCommonShares

11318339

shares

CY2023Q4

us-gaap

Treasury Stock Common Value

TreasuryStockCommonValue

0

usd

CY2022Q4

us-gaap

Treasury Stock Common Value

TreasuryStockCommonValue

455100000

usd

CY2023Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

900000

usd

CY2022Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

407300000

usd

CY2023Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

51800000

usd

CY2022Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-305100000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

1297500000

usd

CY2022Q4

us-gaap

Stockholders Equity

StockholdersEquity

1232900000

usd

CY2023Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

8503100000

usd

CY2022Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

10034400000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Premiums Earned Net

PremiumsEarnedNet

162300000

usd

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1225900000

usd

CY2022

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1740400000

usd

CY2021

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1910100000

usd

CY2023Q4

us-gaap

Net Investment Income

NetInvestmentIncome

28600000

usd

us-gaap

Net Investment Income

NetInvestmentIncome

121300000

usd

CY2022

us-gaap

Net Investment Income

NetInvestmentIncome

129800000

usd

CY2021

us-gaap

Net Investment Income

NetInvestmentIncome

187600000

usd

CY2023Q4

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

100000

usd

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

-20400000

usd

CY2022

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

-115900000

usd

CY2021

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

72400000

usd

CY2023Q4

us-gaap

Debt And Equity Securities Unrealized Gain Loss

DebtAndEquitySecuritiesUnrealizedGainLoss

-200000

usd

us-gaap

Debt And Equity Securities Unrealized Gain Loss

DebtAndEquitySecuritiesUnrealizedGainLoss

-200000

usd

CY2022

us-gaap

Debt And Equity Securities Unrealized Gain Loss

DebtAndEquitySecuritiesUnrealizedGainLoss

3100000

usd

CY2021

us-gaap

Debt And Equity Securities Unrealized Gain Loss

DebtAndEquitySecuritiesUnrealizedGainLoss

-40400000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease

-200000

usd

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease

-2100000

usd

CY2022

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease

-2500000

usd

CY2021

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease

600000

usd

CY2023Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-300000

usd

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-22700000

usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-115300000

usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

32600000

usd

CY2023Q4

us-gaap

Revenues

190600000

usd

us-gaap

Revenues

1324500000

usd

CY2022

us-gaap

Revenues

1754900000

usd

CY2021

us-gaap

Revenues

2130300000

usd

CY2023Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

94200000

usd

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1043200000

usd

CY2022

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1166900000

usd

CY2021

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1314600000

usd

CY2023Q4

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

77200000

usd

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

419000000.0

usd

CY2022

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

670700000

usd

CY2021

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

702300000

usd

CY2023Q4

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

13100000

usd

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

41100000

usd

CY2022

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

51500000

usd

CY2021

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

43700000

usd

CY2023Q4

us-gaap

Interest Expense

InterestExpense

3500000

usd

us-gaap

Interest Expense

InterestExpense

29800000

usd

CY2022

us-gaap

Interest Expense

InterestExpense

26800000

usd

CY2021

us-gaap

Interest Expense

InterestExpense

21600000

usd

CY2023Q4

argo

Fee And Other Income Expense Net

FeeAndOtherIncomeExpenseNet

-200000

usd

argo

Fee And Other Income Expense Net

FeeAndOtherIncomeExpenseNet

-300000

usd

CY2022

argo

Fee And Other Income Expense Net

FeeAndOtherIncomeExpenseNet

-1300000

usd

CY2021

argo

Fee And Other Income Expense Net

FeeAndOtherIncomeExpenseNet

-2000000.0

usd

CY2023Q4

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-600000

usd

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-1800000

usd

CY2022

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

5000000.0

usd

CY2021

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-1600000

usd

CY2023Q4

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

CY2022

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

28500000

usd

CY2021

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

43200000

usd

CY2023Q4

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

188400000

usd

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

1534600000

usd

CY2022

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

1938100000

usd

CY2021

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2125000000

usd

CY2023Q4

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

2200000

usd

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-210100000

usd

CY2022

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-183200000

usd

CY2021

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

5300000

usd

CY2023Q4

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

1300000

usd

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

300000

usd

CY2022

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-8000000.0

usd

CY2021

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-1400000

usd

CY2023Q4

us-gaap

Net Income Loss

NetIncomeLoss

900000

usd

us-gaap

Net Income Loss

NetIncomeLoss

-210400000

usd

CY2022

us-gaap

Net Income Loss

NetIncomeLoss

-175200000

usd

CY2021

us-gaap

Net Income Loss

NetIncomeLoss

6700000

usd

CY2023Q4

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

0

usd

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2022

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2021

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2023Q4

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

900000

usd

CY2023Q4

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

900000

usd

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-220900000

usd

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-220900000

usd

CY2022

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-185700000

usd

CY2022

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-185700000

usd

CY2021

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-3800000

usd

CY2021

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-3800000

usd

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.28

CY2022

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-5.31

CY2021

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-0.11

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.28

CY2022

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-5.31

CY2021

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-0.11

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0

CY2022

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2021

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

35166679

shares

CY2022

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

34980608

shares

CY2021

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

34816160

shares

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

35166679

shares

CY2022

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

34980608

shares

CY2021

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

34816160

shares

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss

DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss

-300000

usd

us-gaap

Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss

DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss

-19800000

usd

CY2022

us-gaap

Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss

DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss

-79200000

usd

CY2021

us-gaap

Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss

DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss

32600000

usd

CY2023Q4

argo

Other Than Temporary Impairment Losses Fixed Maturities

OtherThanTemporaryImpairmentLossesFixedMaturities

0

usd

argo

Other Than Temporary Impairment Losses Fixed Maturities

OtherThanTemporaryImpairmentLossesFixedMaturities

2900000

usd

CY2022

argo

Other Than Temporary Impairment Losses Fixed Maturities

OtherThanTemporaryImpairmentLossesFixedMaturities

36100000

usd

CY2021

argo

Other Than Temporary Impairment Losses Fixed Maturities

OtherThanTemporaryImpairmentLossesFixedMaturities

0

usd

CY2023Q4

us-gaap

Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings

OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings

0

usd

us-gaap

Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings

OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings

2900000

usd

CY2022

us-gaap

Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings

OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings

36100000

usd

CY2021

us-gaap

Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings

OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings

0

usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-115300000

usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

32600000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Net Income Loss

NetIncomeLoss

900000

usd

us-gaap

Net Income Loss

NetIncomeLoss

-210400000

usd

CY2022

us-gaap

Net Income Loss

NetIncomeLoss

-175200000

usd

CY2021

us-gaap

Net Income Loss

NetIncomeLoss

6700000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

100000

usd

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

1000000.0

usd

CY2022

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

-700000

usd

CY2021

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

2600000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

0

usd

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

0

usd

CY2022

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

-31800000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

0

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

800000

usd

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

1000000.0

usd

CY2022

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

-900000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

1900000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

64700000

usd

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

15200000

usd

CY2022

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

-428100000

usd

CY2021

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

-94700000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

100000

usd

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

-28000000.0

usd

CY2022

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

-43600000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

12200000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Before Tax

OtherComprehensiveIncomeLossBeforeTax

65500000

usd

us-gaap

Other Comprehensive Income Loss Before Tax

OtherComprehensiveIncomeLossBeforeTax

45200000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Before Tax

OtherComprehensiveIncomeLossBeforeTax

-354300000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Before Tax

OtherComprehensiveIncomeLossBeforeTax

-102400000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-200000

usd

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-200000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

200000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-400000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

13500000

usd

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

1500000

usd

CY2022

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-80900000

usd

CY2021

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-17300000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

0

usd

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

-5900000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

-9200000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

4200000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Tax

OtherComprehensiveIncomeLossTax

13700000

usd

us-gaap

Other Comprehensive Income Loss Tax

OtherComprehensiveIncomeLossTax

7600000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Tax

OtherComprehensiveIncomeLossTax

-71900000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Tax

OtherComprehensiveIncomeLossTax

-21100000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

51800000

usd

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

37600000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

-282400000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

-81300000

usd

CY2023Q4

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

52700000

usd

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-172800000

usd

CY2022

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-457600000

usd

CY2021

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-74600000

usd

CY2020Q4

us-gaap

Stockholders Equity

StockholdersEquity

1857800000

usd

CY2021

us-gaap

Net Income Loss

NetIncomeLoss

6700000

usd

CY2021

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

-85400000

usd

CY2021

us-gaap

Other Comprehensive Income Other Net Of Tax

OtherComprehensiveIncomeOtherNetOfTax

4100000

usd

CY2021

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

7100000

usd

CY2021

us-gaap

Stock Repurchased And Retired During Period Value

StockRepurchasedAndRetiredDuringPeriodValue

2800000

usd

CY2021

us-gaap

Stock Issued During Period Value Employee Stock Purchase Plan

StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

2100000

usd

CY2021

us-gaap

Dividends Preferred Stock Cash

DividendsPreferredStockCash

10500000

usd

CY2021

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2021

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

43900000

usd

CY2021Q4

us-gaap

Stockholders Equity

StockholdersEquity

1735200000

usd

CY2022

us-gaap

Net Income Loss

NetIncomeLoss

-175200000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

-312800000

usd

CY2022

us-gaap

Other Comprehensive Income Other Net Of Tax

OtherComprehensiveIncomeOtherNetOfTax

30400000

usd

CY2022

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

9600000

usd

CY2022

us-gaap

Stock Issued During Period Value Employee Stock Purchase Plan

StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

1800000

usd

CY2022

us-gaap

Dividends Preferred Stock Cash

DividendsPreferredStockCash

10500000

usd

CY2022

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2022

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

43400000

usd

CY2022Q4

us-gaap

Stockholders Equity

StockholdersEquity

1232900000

usd

us-gaap

Net Income Loss

NetIncomeLoss

-210400000

usd

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

35800000

usd

us-gaap

Other Comprehensive Income Other Net Of Tax

OtherComprehensiveIncomeOtherNetOfTax

1800000

usd

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-600000

usd

us-gaap

Stock Repurchased And Retired During Period Value

StockRepurchasedAndRetiredDuringPeriodValue

900000

usd

us-gaap

Stock Issued During Period Value Employee Stock Purchase Plan

StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

1500000

usd

us-gaap

Dividends Preferred Stock Cash

DividendsPreferredStockCash

10500000

usd

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.00

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

-300000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

1049900000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

1244800000

usd

CY2023Q4

us-gaap

Net Income Loss

NetIncomeLoss

900000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

51100000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Other Net Of Tax

OtherComprehensiveIncomeOtherNetOfTax

700000

usd

CY2023Q4

us-gaap

Stockholders Equity

StockholdersEquity

1297500000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Net Income Loss

NetIncomeLoss

900000

usd

us-gaap

Net Income Loss

NetIncomeLoss

-210400000

usd

CY2022

us-gaap

Net Income Loss

NetIncomeLoss

-175200000

usd

CY2021

us-gaap

Net Income Loss

NetIncomeLoss

6700000

usd

CY2023Q4

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

39600000

usd

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

12200000

usd

CY2022

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

18500000

usd

CY2021

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

43400000

usd

CY2023Q4

us-gaap

Share Based Compensation

ShareBasedCompensation

0

usd

us-gaap

Share Based Compensation

ShareBasedCompensation

1500000

usd

CY2022

us-gaap

Share Based Compensation

ShareBasedCompensation

9600000

usd

CY2021

us-gaap

Share Based Compensation

ShareBasedCompensation

8000000.0

usd

CY2023Q4

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

1300000

usd

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-14900000

usd

CY2022

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

15400000

usd

CY2021

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-38600000

usd

CY2023Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-300000

usd

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-22700000

usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-115300000

usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

32600000

usd

CY2023Q4

argo

Undistributed Earnings From Alternative Investment Portfolio

UndistributedEarningsFromAlternativeInvestmentPortfolio

-2200000

usd

argo

Undistributed Earnings From Alternative Investment Portfolio

UndistributedEarningsFromAlternativeInvestmentPortfolio

-11500000

usd

CY2022

argo

Undistributed Earnings From Alternative Investment Portfolio

UndistributedEarningsFromAlternativeInvestmentPortfolio

-17700000

usd

CY2021

argo

Undistributed Earnings From Alternative Investment Portfolio

UndistributedEarningsFromAlternativeInvestmentPortfolio

-95500000

usd

CY2023Q4

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

0

usd

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

-1200000

usd

CY2022

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

-600000

usd

CY2021

us-gaap

Gain Loss On Disposition Of Assets1

GainLossOnDispositionOfAssets1

-23300000

usd

CY2023Q4

us-gaap

Foreign Currency Transaction Gain Loss Realized

ForeignCurrencyTransactionGainLossRealized

-600000

usd

us-gaap

Foreign Currency Transaction Gain Loss Realized

ForeignCurrencyTransactionGainLossRealized

-1800000

usd

CY2022

us-gaap

Foreign Currency Transaction Gain Loss Realized

ForeignCurrencyTransactionGainLossRealized

0

usd

CY2021

us-gaap

Foreign Currency Transaction Gain Loss Realized

ForeignCurrencyTransactionGainLossRealized

0

usd

CY2023Q4

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

CY2022

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

28500000

usd

CY2021

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

43200000

usd

CY2023Q4

us-gaap

Increase Decrease In Accrued Interest Receivable Net

IncreaseDecreaseInAccruedInterestReceivableNet

3300000

usd

us-gaap

Increase Decrease In Accrued Interest Receivable Net

IncreaseDecreaseInAccruedInterestReceivableNet

-1400000

usd

CY2022

us-gaap

Increase Decrease In Accrued Interest Receivable Net

IncreaseDecreaseInAccruedInterestReceivableNet

-200000

usd

CY2021

us-gaap

Increase Decrease In Accrued Interest Receivable Net

IncreaseDecreaseInAccruedInterestReceivableNet

-800000

usd

CY2023Q4

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-98500000

usd

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-614300000

usd

CY2022

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

193600000

usd

CY2021

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-47400000

usd

CY2023Q4

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

7200000

usd

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

-8800000

usd

CY2022

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

12600000

usd

CY2021

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

-800000

usd

CY2023Q4

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

-31600000

usd

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

69700000

usd

CY2022

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

-88400000

usd

CY2021

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

-65700000

usd

CY2023Q4

us-gaap

Increase Decrease In Future Policy Benefit Reserves

IncreaseDecreaseInFuturePolicyBenefitReserves

17200000

usd

us-gaap

Increase Decrease In Future Policy Benefit Reserves

IncreaseDecreaseInFuturePolicyBenefitReserves

-27900000

usd

CY2022

us-gaap

Increase Decrease In Future Policy Benefit Reserves

IncreaseDecreaseInFuturePolicyBenefitReserves

446200000

usd

CY2021

us-gaap

Increase Decrease In Future Policy Benefit Reserves

IncreaseDecreaseInFuturePolicyBenefitReserves

210800000

usd

CY2023Q4

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-69600000

usd

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-12000000.0

usd

CY2022

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-74700000

usd

CY2021

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

7200000

usd

CY2023Q4

argo

Increase Decrease In Reinsurance Payables And Funds Held

IncreaseDecreaseInReinsurancePayablesAndFundsHeld

-57300000

usd

argo

Increase Decrease In Reinsurance Payables And Funds Held

IncreaseDecreaseInReinsurancePayablesAndFundsHeld

20100000

usd

CY2022

argo

Increase Decrease In Reinsurance Payables And Funds Held

IncreaseDecreaseInReinsurancePayablesAndFundsHeld

-162900000

usd

CY2021

argo

Increase Decrease In Reinsurance Payables And Funds Held

IncreaseDecreaseInReinsurancePayablesAndFundsHeld

-207300000

usd

CY2023Q4

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

100000

usd

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

14600000

usd

CY2022

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

-47500000

usd

CY2021

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

-4500000

usd

CY2023Q4

argo

Increase Decrease In Accrued Underwriting Expenses

IncreaseDecreaseInAccruedUnderwritingExpenses

-19300000

usd

argo

Increase Decrease In Accrued Underwriting Expenses

IncreaseDecreaseInAccruedUnderwritingExpenses

18700000

usd

CY2022

argo

Increase Decrease In Accrued Underwriting Expenses

IncreaseDecreaseInAccruedUnderwritingExpenses

14700000

usd

CY2021

argo

Increase Decrease In Accrued Underwriting Expenses

IncreaseDecreaseInAccruedUnderwritingExpenses

3000000.0

usd

CY2023Q4

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

14300000

usd

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

77200000

usd

CY2022

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

0

usd

CY2021

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-17900000

usd

CY2023Q4

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

16900000

usd

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

293700000

usd

CY2022

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

53200000

usd

CY2021

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

99700000

usd

CY2023Q4

us-gaap

Proceeds From Sale Of Available For Sale Securities Debt

ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

700000

usd

us-gaap

Proceeds From Sale Of Available For Sale Securities Debt

ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

24200000

usd

CY2022

us-gaap

Proceeds From Sale Of Available For Sale Securities Debt

ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

818500000

usd

CY2021

us-gaap

Proceeds From Sale Of Available For Sale Securities Debt

ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

992900000

usd

CY2023Q4

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

22300000

usd

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

139300000

usd

CY2022

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

380100000

usd

CY2021

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

717700000

usd

CY2023Q4

argo

Proceedsfrom Sale And Maturity Of Equity Securities Fvni

ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI

0

usd

argo

Proceedsfrom Sale And Maturity Of Equity Securities Fvni

ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI

45700000

usd

CY2022

argo

Proceedsfrom Sale And Maturity Of Equity Securities Fvni

ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI

17800000

usd

CY2021

argo

Proceedsfrom Sale And Maturity Of Equity Securities Fvni

ProceedsfromSaleAndMaturityOfEquitySecuritiesFVNI

125800000

usd

CY2023Q4

us-gaap

Proceeds From Sale Of Other Investments

ProceedsFromSaleOfOtherInvestments

22200000

usd

us-gaap

Proceeds From Sale Of Other Investments

ProceedsFromSaleOfOtherInvestments

24000000.0

usd

CY2022

us-gaap

Proceeds From Sale Of Other Investments

ProceedsFromSaleOfOtherInvestments

58100000

usd

CY2021

us-gaap

Proceeds From Sale Of Other Investments

ProceedsFromSaleOfOtherInvestments

212300000

usd

CY2023Q4

us-gaap

Payments To Acquire Available For Sale Securities Debt

PaymentsToAcquireAvailableForSaleSecuritiesDebt

10100000

usd

us-gaap

Payments To Acquire Available For Sale Securities Debt

PaymentsToAcquireAvailableForSaleSecuritiesDebt

11900000

usd

CY2022

us-gaap

Payments To Acquire Available For Sale Securities Debt

PaymentsToAcquireAvailableForSaleSecuritiesDebt

1093600000

usd

CY2021

us-gaap

Payments To Acquire Available For Sale Securities Debt

PaymentsToAcquireAvailableForSaleSecuritiesDebt

1932900000

usd

CY2023Q4

us-gaap

Payments To Acquire Equity Securities Fv Ni

PaymentsToAcquireEquitySecuritiesFvNi

0

usd

us-gaap

Payments To Acquire Equity Securities Fv Ni

PaymentsToAcquireEquitySecuritiesFvNi

300000

usd

CY2022

us-gaap

Payments To Acquire Equity Securities Fv Ni

PaymentsToAcquireEquitySecuritiesFvNi

1000000.0

usd

CY2021

us-gaap

Payments To Acquire Equity Securities Fv Ni

PaymentsToAcquireEquitySecuritiesFvNi

5300000

usd

CY2023Q4

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

2900000

usd

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

19300000

usd

CY2022

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

52800000

usd

CY2021

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

47400000

usd

CY2023Q4

argo

Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools

PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools

0

usd

argo

Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools

PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools

0

usd

CY2022

argo

Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools

PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools

6700000

usd

CY2021

argo

Payments For Proceeds From Change In Foreign Regulatory Deposits And Voluntary Pools

PaymentsForProceedsFromChangeInForeignRegulatoryDepositsAndVoluntaryPools

27100000

usd

CY2023Q4

us-gaap

Payments To Acquire Finance Receivables

PaymentsToAcquireFinanceReceivables

0

usd

us-gaap

Payments To Acquire Finance Receivables

PaymentsToAcquireFinanceReceivables

0

usd

CY2022

us-gaap

Payments To Acquire Finance Receivables

PaymentsToAcquireFinanceReceivables

159900000

usd

CY2021

us-gaap

Payments To Acquire Finance Receivables

PaymentsToAcquireFinanceReceivables

0

usd

CY2023Q4

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-24100000

usd

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

627000000.0

usd

CY2022

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-26100000

usd

CY2021

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

116400000

usd

CY2023Q4

argo

Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts

IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts

1300000

usd

argo

Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts

IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts

4500000

usd

CY2022

argo

Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts

IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts

-22000000.0

usd

CY2021

argo

Increase Decrease In Settlements Of Foreign Currency Exchange Forward Contracts

IncreaseDecreaseInSettlementsOfForeignCurrencyExchangeForwardContracts

-1200000

usd

CY2023Q4

us-gaap

Proceeds From Divestiture Of Businesses Net Of Cash Divested

ProceedsFromDivestitureOfBusinessesNetOfCashDivested

4200000

usd

us-gaap

Proceeds From Divestiture Of Businesses Net Of Cash Divested

ProceedsFromDivestitureOfBusinessesNetOfCashDivested

63800000

usd

CY2022

us-gaap

Proceeds From Divestiture Of Businesses Net Of Cash Divested

ProceedsFromDivestitureOfBusinessesNetOfCashDivested

14900000

usd

CY2021

us-gaap

Proceeds From Divestiture Of Businesses Net Of Cash Divested

ProceedsFromDivestitureOfBusinessesNetOfCashDivested

0

usd

CY2023Q4

argo

Payments For Proceeds From Property Plant And Equipment

PaymentsForProceedsFromPropertyPlantAndEquipment

0

usd

argo

Payments For Proceeds From Property Plant And Equipment

PaymentsForProceedsFromPropertyPlantAndEquipment

-2700000

usd

CY2022

argo

Payments For Proceeds From Property Plant And Equipment

PaymentsForProceedsFromPropertyPlantAndEquipment

-6100000

usd

CY2021

argo

Payments For Proceeds From Property Plant And Equipment

PaymentsForProceedsFromPropertyPlantAndEquipment

18000000.0

usd

CY2023Q4

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

usd

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

usd

CY2022

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

usd

CY2021

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

-7700000

usd

CY2023Q4

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

61800000

usd

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-359700000

usd

CY2022

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-26600000

usd

CY2021

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-55900000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans

ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans

0

usd

us-gaap

Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans

ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans

700000

usd

CY2022

us-gaap

Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans

ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans

1800000

usd

CY2021

us-gaap

Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans

ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans

1300000

usd

CY2023Q4

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

0

usd

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

10500000

usd

CY2022

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

10500000

usd

CY2021

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

10500000

usd

CY2023Q4

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

0

usd

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

-300000

usd

CY2022

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

43400000

usd

CY2021

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

43700000

usd

CY2023Q4

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

0

usd

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-9500000

usd

CY2022

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-52100000

usd

CY2021

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-52900000

usd

CY2023Q4

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

0

usd

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

300000

usd

CY2022

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

400000

usd

CY2021

us-gaap

Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

6400000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

78700000

usd

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-75200000

usd

CY2022

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-25100000

usd

CY2021

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

-2700000

usd

CY2023Q4

us-gaap

Net Cash Provided By Used In Discontinued Operations

NetCashProvidedByUsedInDiscontinuedOperations

0

usd

us-gaap

Net Cash Provided By Used In Discontinued Operations

NetCashProvidedByUsedInDiscontinuedOperations

-70800000

usd

CY2022

us-gaap

Net Cash Provided By Used In Discontinued Operations

NetCashProvidedByUsedInDiscontinuedOperations

70800000

usd

CY2021

us-gaap

Net Cash Provided By Used In Discontinued Operations

NetCashProvidedByUsedInDiscontinuedOperations

0

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

712900000

usd

CY2022Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

50200000

usd

CY2021Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

146100000

usd

CY2020Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

148800000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

791600000

usd

CY2023Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

45800000

usd

CY2022Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

50200000

usd

CY2021Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

146100000

usd

CY2023

us-gaap

Number Of Reportable Segments

NumberOfReportableSegments

2

segment

CY2023Q4

us-gaap

Preferred Stock Dividend Rate Percentage

PreferredStockDividendRatePercentage

0.0700

CY2023Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

1.00

CY2023

us-gaap

Contracts In Force Subject To Participation Through Reinsurance Percentage

ContractsInForceSubjectToParticipationThroughReinsurancePercentage

1

CY2023

argo

Number Of Statutory Trust

NumberOfStatutoryTrust

11

trust

CY2023Q4

argo

Other Intangible Assets Gross Excluding Goodwill

OtherIntangibleAssetsGrossExcludingGoodwill

185800000

usd

CY2023Q4

argo

Other Finite Lived Intangible Assets Accumulated Amortization

OtherFiniteLivedIntangibleAssetsAccumulatedAmortization

5200000

usd

CY2023Q4

us-gaap

Other Intangible Assets Net

OtherIntangibleAssetsNet

180600000

usd

CY2023Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

362100000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

37900000

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

324200000

usd

CY2023Q4

us-gaap

Present Value Of Future Insurance Profits Amortization Expense1

PresentValueOfFutureInsuranceProfitsAmortizationExpense1

-37900000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Next Twelve Months

FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

171700000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Two

FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

39800000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Three

FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

25700000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Four

FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

17400000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

13300000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense After Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

31300000

usd

CY2023Q4

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

299200000

usd

CY2022

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

28500000

usd

CY2022

us-gaap

Impairment Of Intangible Assets Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill

17300000

usd

CY2022

us-gaap

Goodwill Impairment Loss

GoodwillImpairmentLoss

11200000

usd

CY2022

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

0

usd

CY2021

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

0

usd

CY2023Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

2300000

usd

CY2022Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

144700000

usd

CY2023Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

31100000

usd

CY2022Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

43600000

usd

CY2023Q4

us-gaap

Depreciation

2300000

usd

us-gaap

Depreciation

9100000

usd

CY2022

us-gaap

Depreciation

22300000

usd

CY2021

us-gaap

Depreciation

23900000

usd

CY2023

us-gaap

Malpractice Loss Contingency Return Of Premiums

MalpracticeLossContingencyReturnOfPremiums

0

usd

CY2022

us-gaap

Malpractice Loss Contingency Return Of Premiums

MalpracticeLossContingencyReturnOfPremiums

200000

usd

CY2023

argo

Malpractice Loss Contingency Premiums Receivables Due

MalpracticeLossContingencyPremiumsReceivablesDue

200000

usd

CY2022

argo

Malpractice Loss Contingency Premiums Receivables Due

MalpracticeLossContingencyPremiumsReceivablesDue

200000

usd

CY2023Q4

us-gaap

Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax

AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

-100000

usd

CY2022Q4

us-gaap

Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax

AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

-4200000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Interest Paid Net

InterestPaidNet

5300000

usd

us-gaap

Interest Paid Net

InterestPaidNet

28300000

usd

CY2022

us-gaap

Interest Paid Net

InterestPaidNet

24100000

usd

CY2021

us-gaap

Interest Paid Net

InterestPaidNet

21800000

usd

CY2023Q4

us-gaap

Income Taxes Paid

IncomeTaxesPaid

100000

usd

us-gaap

Income Taxes Paid

IncomeTaxesPaid

200000

usd

CY2022

us-gaap

Income Taxes Paid

IncomeTaxesPaid

26200000

usd

CY2021

us-gaap

Income Taxes Paid

IncomeTaxesPaid

43000000.0

usd

CY2023Q4

us-gaap

Proceeds From Income Tax Refunds

ProceedsFromIncomeTaxRefunds

0

usd

us-gaap

Proceeds From Income Tax Refunds

ProceedsFromIncomeTaxRefunds

100000

usd

CY2022

us-gaap

Proceeds From Income Tax Refunds

ProceedsFromIncomeTaxRefunds

2100000

usd

CY2021

us-gaap

Proceeds From Income Tax Refunds

ProceedsFromIncomeTaxRefunds

2600000

usd

CY2023Q4

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

100000

usd

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

100000

usd

CY2022

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

24100000

usd

CY2021

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

40400000

usd

CY2022Q3

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Reserves Cover

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferReservesCover

746000000

usd

CY2022Q3

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Additional Cover In Excess Of Threshold

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferAdditionalCoverInExcessOfThreshold

275000000

usd

CY2022Q3

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Additional Coverage Threshold

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferAdditionalCoverageThreshold

821000000

usd

CY2022Q3

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Policy Limit

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferPolicyLimit

1096000000

usd

CY2022

argo

Liability For Claims And Claims Adjustment Expense Recognized Loss

LiabilityForClaimsAndClaimsAdjustmentExpenseRecognizedLoss

75000000

usd

CY2022Q4

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Available

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferAvailable

188600000

usd

CY2022Q4

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Additional Cover In Excess Of Threshold

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferAdditionalCoverInExcessOfThreshold

275000000

usd

CY2022Q3

us-gaap

Other Asset Impairment Charges

OtherAssetImpairmentCharges

34200000

usd

CY2022Q4

us-gaap

Other Asset Impairment Charges

OtherAssetImpairmentCharges

3400000

usd

CY2022Q4

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Reserves Transferred

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferReservesTransferred

509000000

usd

CY2022Q4

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Reserves Cover

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferReservesCover

746000000

usd

CY2022Q4

argo

Liability For Claims And Claims Adjustment Expense Portfolio Transfer Cash And Investments Transferred

LiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransferCashAndInvestmentsTransferred

630000000

usd

CY2022Q4

argo

Increase Decrease In Reinsurance Recoverable For Paid And Unpaid Claims And Claims Adjustments

IncreaseDecreaseInReinsuranceRecoverableForPaidAndUnpaidClaimsAndClaimsAdjustments

509000000

usd

CY2022Q4

argo

Increase Decrease In Investments And Cash

IncreaseDecreaseInInvestmentsAndCash

-630000000

usd

CY2022Q4

argo

Gain Loss On Liability For Claims And Claims Adjustment Expense Portfolio Transfer

GainLossOnLiabilityForClaimsAndClaimsAdjustmentExpensePortfolioTransfer

-100000000

usd

CY2022Q4

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

121000000

usd

CY2023Q4

argo

Deferred Gain On Ceded Premiums Reserve

DeferredGainOnCededPremiumsReserve

82400000

usd

CY2022Q4

argo

Fair Value Of Investments Assets Managed On Behalf Of Trade Capital Providers

FairValueOfInvestmentsAssetsManagedOnBehalfOfTradeCapitalProviders

55900000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss

DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss

2521500000

usd

CY2023Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

65500000

usd

CY2023Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

1400000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

200000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest

DebtSecuritiesAvailableForSaleExcludingAccruedInterest

2585400000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss

DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss

3016400000

usd

CY2022Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

2100000

usd

CY2022Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

340200000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

2800000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest

DebtSecuritiesAvailableForSaleExcludingAccruedInterest

2675500000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

290200000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

290800000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

1019700000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

1037400000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

322100000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

337700000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

30900000

usd

CY2023Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

34100000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss

DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss

2521500000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest

DebtSecuritiesAvailableForSaleExcludingAccruedInterest

2585400000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Term

DebtSecuritiesAvailableForSaleTerm

P2Y8M4D

CY2022Q4

us-gaap

Debt Securities Available For Sale Term

DebtSecuritiesAvailableForSaleTerm

P3Y3M14D

CY2023Q4

us-gaap

Other Investments

OtherInvestments

311000000.0

usd

CY2023Q4

us-gaap

Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments

FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

93400000

usd

CY2022Q4

us-gaap

Other Investments

OtherInvestments

323200000

usd

CY2022Q4

us-gaap

Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments

FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

108900000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

107200000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

1400000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

0

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

0

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

107200000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss

DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

1400000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

1557500000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

143600000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

1066400000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

196600000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

2623900000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss

DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

340200000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position Number Of Positions

DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions

1431

security

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions

104

security

CY2023Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions

0

security

CY2021Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

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usd

CY2022

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Not Previously Recorded

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded

2200000

usd

CY2022

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Securities Sold

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossSecuritiesSold

800000

usd

CY2022

argo

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Reduction For Credit Impairment

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossReductionForCreditImpairment

1400000

usd

CY2022

argo

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Additional Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossAdditionalPeriodIncreaseDecrease

300000

usd

CY2022Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

2800000

usd

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Not Previously Recorded

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded

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usd

us-gaap

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Securities Sold

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossSecuritiesSold

700000

usd

argo

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Reduction For Credit Impairment

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossReductionForCreditImpairment

0

usd

argo

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Additional Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossAdditionalPeriodIncreaseDecrease

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usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

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usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

0

usd

CY2023Q4

argo

Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Additional Period Increase Decrease

DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossAdditionalPeriodIncreaseDecrease

200000

usd

CY2023Q4

us-gaap

Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest

DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest

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usd

CY2023Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

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usd

CY2023Q4

srt

Financing Receivable Before Allowance For Credit Loss To Total Percent

FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent

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CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

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usd

CY2022Q4

srt

Financing Receivable Before Allowance For Credit Loss To Total Percent

FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent

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CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2023Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

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usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

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usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2023Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

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usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

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usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

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loan

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity One Year Or Less

FinancingReceivableBeforeAllowanceForCreditLossMaturityOneYearOrLess

19700000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity One Year Or Less Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityOneYearOrLessNumberOfLoans

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loan

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than One Year And Less Than Three

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanOneYearAndLessThanThree

34900000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than One Year And Less Than Three Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanOneYearAndLessThanThreeNumberOfLoans

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loan

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Three Years And Less Than Five Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanThreeYearsAndLessThanFiveYears

32400000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Three Years And Less Than Five Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanThreeYearsAndLessThanFiveYearsNumberOfLoans

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loan

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Five Years And Less Than Seven Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanFiveYearsAndLessThanSevenYears

17200000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Five Years And Less Than Seven Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanFiveYearsAndLessThanSevenYearsNumberOfLoans

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loan

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Seven Years And Less Than Ten Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanSevenYearsAndLessThanTenYears

40600000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Seven Years And Less Than Ten Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanSevenYearsAndLessThanTenYearsNumberOfLoans

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loan

CY2023Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

144800000

usd

CY2023Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

28

loan

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than One Year And Less Than Three

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanOneYearAndLessThanThree

54800000

usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than One Year And Less Than Three Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanOneYearAndLessThanThreeNumberOfLoans

10

loan

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Three Years And Less Than Five Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanThreeYearsAndLessThanFiveYears

33800000

usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Three Years And Less Than Five Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanThreeYearsAndLessThanFiveYearsNumberOfLoans

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loan

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Five Years And Less Than Seven Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanFiveYearsAndLessThanSevenYears

20400000

usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Five Years And Less Than Seven Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanFiveYearsAndLessThanSevenYearsNumberOfLoans

4

loan

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Seven Years And Less Than Ten Years

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanSevenYearsAndLessThanTenYears

50900000

usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Maturity Greater Than Seven Years And Less Than Ten Years Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossMaturityGreaterThanSevenYearsAndLessThanTenYearsNumberOfLoans

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loan

CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

159900000

usd

CY2022Q4

argo

Financing Receivable Before Allowance For Credit Loss Number Of Loans

FinancingReceivableBeforeAllowanceForCreditLossNumberOfLoans

28

loan

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

argo

Gross Realized Investment On Fixed Maturities And Other Gains

GrossRealizedInvestmentOnFixedMaturitiesAndOtherGains

5500000

usd

argo

Gross Realized Investment On Fixed Maturities And Other Gains

GrossRealizedInvestmentOnFixedMaturitiesAndOtherGains

15500000

usd

CY2022

argo

Gross Realized Investment On Fixed Maturities And Other Gains

GrossRealizedInvestmentOnFixedMaturitiesAndOtherGains

55300000

usd

CY2021

argo

Gross Realized Investment On Fixed Maturities And Other Gains

GrossRealizedInvestmentOnFixedMaturitiesAndOtherGains

43700000

usd

CY2023Q4

argo

Gross Realized Investment On Fixed Maturities And Other Losses

GrossRealizedInvestmentOnFixedMaturitiesAndOtherLosses

5400000

usd

argo

Gross Realized Investment On Fixed Maturities And Other Losses

GrossRealizedInvestmentOnFixedMaturitiesAndOtherLosses

37000000.0

usd

CY2022

argo

Gross Realized Investment On Fixed Maturities And Other Losses

GrossRealizedInvestmentOnFixedMaturitiesAndOtherLosses

81000000.0

usd

CY2021

argo

Gross Realized Investment On Fixed Maturities And Other Losses

GrossRealizedInvestmentOnFixedMaturitiesAndOtherLosses

42800000

usd

CY2023Q4

argo

Other Realized Gains Losses On Investments

OtherRealizedGainsLossesOnInvestments

0

usd

argo

Other Realized Gains Losses On Investments

OtherRealizedGainsLossesOnInvestments

-8400000

usd

CY2022

argo

Other Realized Gains Losses On Investments

OtherRealizedGainsLossesOnInvestments

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usd

CY2021

argo

Other Realized Gains Losses On Investments

OtherRealizedGainsLossesOnInvestments

-6300000

usd

CY2023Q4

argo

Net Realized Investment On Fixed Maturities And Other Losses

NetRealizedInvestmentOnFixedMaturitiesAndOtherLosses

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usd

argo

Net Realized Investment On Fixed Maturities And Other Losses

NetRealizedInvestmentOnFixedMaturitiesAndOtherLosses

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usd

CY2022

argo

Net Realized Investment On Fixed Maturities And Other Losses

NetRealizedInvestmentOnFixedMaturitiesAndOtherLosses

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usd

CY2021

argo

Net Realized Investment On Fixed Maturities And Other Losses

NetRealizedInvestmentOnFixedMaturitiesAndOtherLosses

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usd

CY2023Q4

us-gaap

Equity Securities Fv Ni Realized Gain Loss

EquitySecuritiesFvNiRealizedGainLoss

0

usd

us-gaap

Equity Securities Fv Ni Realized Gain Loss

EquitySecuritiesFvNiRealizedGainLoss

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usd

CY2022

us-gaap

Equity Securities Fv Ni Realized Gain Loss

EquitySecuritiesFvNiRealizedGainLoss

1200000

usd

CY2021

us-gaap

Equity Securities Fv Ni Realized Gain Loss

EquitySecuritiesFvNiRealizedGainLoss

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usd

CY2023Q4

us-gaap

Equity Securities Fv Ni Unrealized Gain Loss

EquitySecuritiesFvNiUnrealizedGainLoss

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usd

us-gaap

Equity Securities Fv Ni Unrealized Gain Loss

EquitySecuritiesFvNiUnrealizedGainLoss

5500000

usd

CY2022

us-gaap

Equity Securities Fv Ni Unrealized Gain Loss

EquitySecuritiesFvNiUnrealizedGainLoss

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usd

CY2021

us-gaap

Equity Securities Fv Ni Unrealized Gain Loss

EquitySecuritiesFvNiUnrealizedGainLoss

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usd

CY2023Q4

us-gaap

Equity Securities Fv Ni Gain Loss

EquitySecuritiesFvNiGainLoss

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usd

us-gaap

Equity Securities Fv Ni Gain Loss

EquitySecuritiesFvNiGainLoss

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usd

CY2022

us-gaap

Equity Securities Fv Ni Gain Loss

EquitySecuritiesFvNiGainLoss

4300000

usd

CY2021

us-gaap

Equity Securities Fv Ni Gain Loss

EquitySecuritiesFvNiGainLoss

37400000

usd

CY2023Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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usd

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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usd

CY2023Q4

argo

Income Tax Expense Benefit Related To Net Realized Investment And Other Gains

IncomeTaxExpenseBenefitRelatedToNetRealizedInvestmentAndOtherGains

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usd

argo

Income Tax Expense Benefit Related To Net Realized Investment And Other Gains

IncomeTaxExpenseBenefitRelatedToNetRealizedInvestmentAndOtherGains

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CY2022

argo

Income Tax Expense Benefit Related To Net Realized Investment And Other Gains

IncomeTaxExpenseBenefitRelatedToNetRealizedInvestmentAndOtherGains

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usd

CY2021

argo

Income Tax Expense Benefit Related To Net Realized Investment And Other Gains

IncomeTaxExpenseBenefitRelatedToNetRealizedInvestmentAndOtherGains

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usd

CY2023Q4

argo

Net Realized Investment Gains Losses Net Of Income Taxes

NetRealizedInvestmentGainsLossesNetOfIncomeTaxes

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usd

argo

Net Realized Investment Gains Losses Net Of Income Taxes

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usd

CY2022

argo

Net Realized Investment Gains Losses Net Of Income Taxes

NetRealizedInvestmentGainsLossesNetOfIncomeTaxes

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usd

CY2021

argo

Net Realized Investment Gains Losses Net Of Income Taxes

NetRealizedInvestmentGainsLossesNetOfIncomeTaxes

26400000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

argo

Gains Losses In Investment Unrealized Appreciation Depreciation Before Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationBeforeTax

64600000

usd

argo

Gains Losses In Investment Unrealized Appreciation Depreciation Before Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationBeforeTax

43200000

usd

CY2022

argo

Gains Losses In Investment Unrealized Appreciation Depreciation Before Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationBeforeTax

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usd

CY2021

argo

Gains Losses In Investment Unrealized Appreciation Depreciation Before Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationBeforeTax

-106900000

usd

CY2023Q4

argo

Income Tax Expense Benefit Related To Unrealized Appreciation Depreciation Net Tax Effects

IncomeTaxExpenseBenefitRelatedToUnrealizedAppreciationDepreciationNetTaxEffects

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usd

argo

Income Tax Expense Benefit Related To Unrealized Appreciation Depreciation Net Tax Effects

IncomeTaxExpenseBenefitRelatedToUnrealizedAppreciationDepreciationNetTaxEffects

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usd

CY2022

argo

Income Tax Expense Benefit Related To Unrealized Appreciation Depreciation Net Tax Effects

IncomeTaxExpenseBenefitRelatedToUnrealizedAppreciationDepreciationNetTaxEffects

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usd

CY2021

argo

Income Tax Expense Benefit Related To Unrealized Appreciation Depreciation Net Tax Effects

IncomeTaxExpenseBenefitRelatedToUnrealizedAppreciationDepreciationNetTaxEffects

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usd

CY2023Q4

argo

Gains Losses In Investment Unrealized Appreciation Depreciation After Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationAfterTax

51100000

usd

argo

Gains Losses In Investment Unrealized Appreciation Depreciation After Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationAfterTax

35800000

usd

CY2022

argo

Gains Losses In Investment Unrealized Appreciation Depreciation After Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationAfterTax

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usd

CY2021

argo

Gains Losses In Investment Unrealized Appreciation Depreciation After Tax

GainsLossesInInvestmentUnrealizedAppreciationDepreciationAfterTax

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usd

CY2023Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

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usd

CY2022Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

5200000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGain

4500000

usd

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGain

13500000

usd

CY2022

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGain

33900000

usd

CY2021

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Gain

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGain

33200000

usd

CY2023Q4

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Loss

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss

3600000

usd

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Loss

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss

12400000

usd

CY2022

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Loss

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss

47200000

usd

CY2021

us-gaap

Derivative Instruments Not Designated As Hedging Instruments Loss

DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss

41900000

usd

CY2022Q4

argo

Securities And Letters Of Credit Pledged As Part Of Syndicate Minimum Amount

SecuritiesAndLettersOfCreditPledgedAsPartOfSyndicateMinimumAmount

171400000

usd

CY2022Q4

argo

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Difference Due To Rounding

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValueDifferenceDueToRounding

56200000

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3

5600000

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

13200000

usd

CY2023

argo

Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag

FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleListNotDisclosedFlag

Included in net income

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

-500000

usd

CY2023

argo

Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Other Comprehensive Income Extensible List Not Disclosed Flag

FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag

Included in other comprehensive income

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

800000

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

10600000

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

1600000

usd

CY2023

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

1100000

usd

CY2023Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

56800000

usd

CY2023

argo

Amount Of Gains Or Losses For Period Included In Net Income Attributable To Change In Unrealized Gains Or Losses Relating To Assets Held At End Of Period

AmountOfGainsOrLossesForPeriodIncludedInNetIncomeAttributableToChangeInUnrealizedGainsOrLossesRelatingToAssetsHeldAtEndOfPeriod

800000

usd

CY2021Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

17500000

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3

37600000

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

0

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

-1100000

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

-4800000

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

10000000.0

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

3000000.0

usd

CY2022

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

0

usd

CY2022Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

56200000

usd

CY2022

argo

Amount Of Gains Or Losses For Period Included In Net Income Attributable To Change In Unrealized Gains Or Losses Relating To Assets Held At End Of Period

AmountOfGainsOrLossesForPeriodIncludedInNetIncomeAttributableToChangeInUnrealizedGainsOrLossesRelatingToAssetsHeldAtEndOfPeriod

4400000

usd

CY2023Q4

us-gaap

Financing Receivable Allowance For Credit Loss Excluding Accrued Interest

FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest

200000

usd

CY2023Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

144800000

usd

CY2022Q4

us-gaap

Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss

FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

159900000

usd

CY2022Q4

us-gaap

Operating Lease Weighted Average Discount Rate Percent

OperatingLeaseWeightedAverageDiscountRatePercent

0.0344

CY2023Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

51200000

usd

CY2021Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

648600000

usd

CY2021Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

5700000

usd

CY2022

us-gaap

Premium Receivable Credit Loss Expense Reversal

PremiumReceivableCreditLossExpenseReversal

200000

usd

CY2022

us-gaap

Premiums Receivable Allowance For Doubtful Accounts Write Offs Against Allowance

PremiumsReceivableAllowanceForDoubtfulAccountsWriteOffsAgainstAllowance

1200000

usd

CY2022Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

292000000.0

usd

CY2022Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

4700000

usd

us-gaap

Premium Receivable Credit Loss Expense Reversal

PremiumReceivableCreditLossExpenseReversal

5400000

usd

us-gaap

Premiums Receivable Allowance For Doubtful Accounts Write Offs Against Allowance

PremiumsReceivableAllowanceForDoubtfulAccountsWriteOffsAgainstAllowance

2700000

usd

CY2023Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

306800000

usd

CY2023Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

7400000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

306800000

usd

CY2023Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

0

usd

CY2023Q4

us-gaap

Premium Receivable Credit Loss Expense Reversal

PremiumReceivableCreditLossExpenseReversal

3300000

usd

CY2023Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts Write Offs Against Allowance

PremiumsReceivableAllowanceForDoubtfulAccountsWriteOffsAgainstAllowance

300000

usd

CY2023Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

230700000

usd

CY2023Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

3000000.0

usd

CY2021Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

2966400000

usd

CY2021Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

3800000

usd

CY2022

us-gaap

Reinsurance Recoverable Credit Loss Expense Reversal

ReinsuranceRecoverableCreditLossExpenseReversal

1700000

usd

CY2022

argo

Reinsurance Recoverable Allowance For Credit Loss Reclassified To Assets Held For Sale

ReinsuranceRecoverableAllowanceForCreditLossReclassifiedToAssetsHeldForSale

800000

usd

CY2022Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

3029100000

usd

CY2022Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

4700000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

2981600000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

4700000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

2959300000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

0

usd

CY2022Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

57700000

usd

CY2023Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

51400000

usd

CY2022Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

66400000

usd

CY2023Q4

us-gaap

Operating Lease Weighted Average Remaining Lease Term1

OperatingLeaseWeightedAverageRemainingLeaseTerm1

P7Y8M12D

CY2022Q4

us-gaap

Operating Lease Weighted Average Remaining Lease Term1

OperatingLeaseWeightedAverageRemainingLeaseTerm1

P8Y2M19D

CY2023Q4

us-gaap

Operating Lease Weighted Average Discount Rate Percent

OperatingLeaseWeightedAverageDiscountRatePercent

0.0613

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Operating Lease Cost

OperatingLeaseCost

700000

usd

us-gaap

Operating Lease Cost

OperatingLeaseCost

5200000

usd

CY2022

us-gaap

Operating Lease Cost

OperatingLeaseCost

8100000

usd

CY2023Q4

us-gaap

Variable Lease Cost

VariableLeaseCost

500000

usd

us-gaap

Variable Lease Cost

VariableLeaseCost

3300000

usd

CY2022

us-gaap

Variable Lease Cost

VariableLeaseCost

4700000

usd

CY2023Q4

us-gaap

Sublease Income

SubleaseIncome

100000

usd

us-gaap

Sublease Income

SubleaseIncome

900000

usd

CY2022

us-gaap

Sublease Income

SubleaseIncome

1000000.0

usd

CY2023Q4

us-gaap

Lease Cost

LeaseCost

1100000

usd

us-gaap

Lease Cost

LeaseCost

7600000

usd

CY2022

us-gaap

Lease Cost

LeaseCost

11800000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due Next Twelve Months

LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

8900000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due Year Two

LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

9100000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due Year Three

LesseeOperatingLeaseLiabilityPaymentsDueYearThree

8900000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due Year Four

LesseeOperatingLeaseLiabilityPaymentsDueYearFour

8300000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due Year Five

LesseeOperatingLeaseLiabilityPaymentsDueYearFive

6900000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due After Year Five

LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

22500000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Payments Due

LesseeOperatingLeaseLiabilityPaymentsDue

64600000

usd

CY2023Q4

us-gaap

Lessee Operating Lease Liability Undiscounted Excess Amount

LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

13200000

usd

CY2023Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

51400000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

0

usd

CY2022Q4

us-gaap

Reinsurance Recoverables Allowance

ReinsuranceRecoverablesAllowance

4700000

usd

CY2023Q4

argo

Collateral Under Reinsurance Agreements

CollateralUnderReinsuranceAgreements

1212200000

usd

CY2022Q4

argo

Collateral Under Reinsurance Agreements

CollateralUnderReinsuranceAgreements

1299300000

usd

CY2023Q4

us-gaap

Reinsurance Recoverables On Paid Losses

ReinsuranceRecoverablesOnPaidLosses

161900000

usd

CY2022Q4

us-gaap

Reinsurance Recoverables On Paid Losses

ReinsuranceRecoverablesOnPaidLosses

190600000

usd

CY2023Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

94200000

usd

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1043200000

usd

CY2022

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1166900000

usd

CY2021

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1314600000

usd

CY2023Q4

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

79300000

usd

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

607300000

usd

CY2022

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

958800000

usd

CY2021

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

829600000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Direct Premiums Written

DirectPremiumsWritten

186000000.0

usd

us-gaap

Direct Premiums Written

DirectPremiumsWritten

1907900000

usd

CY2022

us-gaap

Direct Premiums Written

DirectPremiumsWritten

2682800000

usd

CY2021

us-gaap

Direct Premiums Written

DirectPremiumsWritten

2990600000

usd

CY2023Q4

us-gaap

Ceded Premiums Written

CededPremiumsWritten

66800000

usd

us-gaap

Ceded Premiums Written

CededPremiumsWritten

803600000

usd

CY2022

us-gaap

Ceded Premiums Written

CededPremiumsWritten

1106700000

usd

CY2021

us-gaap

Ceded Premiums Written

CededPremiumsWritten

1203900000

usd

CY2023Q4

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

5100000

usd

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

40400000

usd

CY2022

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

165400000

usd

CY2021

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

190600000

usd

CY2023Q4

us-gaap

Premiums Written Net

PremiumsWrittenNet

124300000

usd

us-gaap

Premiums Written Net

PremiumsWrittenNet

1144700000

usd

CY2022

us-gaap

Premiums Written Net

PremiumsWrittenNet

1741500000

usd

CY2021

us-gaap

Premiums Written Net

PremiumsWrittenNet

1977300000

usd

CY2023Q4

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

252300000

usd

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

1906500000

usd

CY2022

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

2757800000

usd

CY2021

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

2917700000

usd

CY2023Q4

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

98400000

usd

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

724900000

usd

CY2022

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

1205300000

usd

CY2021

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

1272700000

usd

CY2023Q4

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

8400000

usd

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

44300000

usd

CY2022

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

187900000

usd

CY2021

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

265100000

usd

CY2023Q4

us-gaap

Premiums Earned Net

PremiumsEarnedNet

162300000

usd

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1225900000

usd

CY2022

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1740400000

usd

CY2021

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1910100000

usd

CY2023Q4

us-gaap

Premiums Percentage Assumed To Net

PremiumsPercentageAssumedToNet

0.052

us-gaap

Premiums Percentage Assumed To Net

PremiumsPercentageAssumedToNet

0.036

CY2022

us-gaap

Premiums Percentage Assumed To Net

PremiumsPercentageAssumedToNet

0.108

CY2021

us-gaap

Premiums Percentage Assumed To Net

PremiumsPercentageAssumedToNet

0.139

CY2023

us-gaap

Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense

ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense

<div style="margin-top:12pt;text-align:justify">The following table provides a reconciliation of reserves for losses and loss adjustment expenses (“LAE”):</div><div style="text-align:justify"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.861%"><tr><td style="width:1.0%"></td><td style="width:47.995%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.000%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.356%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.356%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.000%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.495%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.000%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.495%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.003%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom">Successor</td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-left:1pt solid #000;padding:0 1pt"></td><td colspan="15" style="border-bottom:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">Predecessor</td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">Period from </td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">Period from </td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="9" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">For the Years Ended December 31,</td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom">(in millions)</td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom">November 16, 2023 through December 31, 2023</td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom">January 1, 2023 through November 15, 2023</td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">2022</td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom">2021</td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom">Net reserves beginning of the period</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom">2,734.6 </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom">2,213.1 </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom">3,123.2 </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom">2,906.1 </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom">Add:</td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Losses and LAE incurred during current calendar year, net of reinsurance:</td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 24.25pt;text-align:left;vertical-align:bottom">Current accident year</td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">94.2 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">775.3 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1,102.2 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1,176.3 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 24.25pt;text-align:left;vertical-align:bottom">Prior accident years</td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">267.9 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">64.7 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">138.3 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Losses and LAE incurred during calendar year, net of reinsurance</td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">94.2 </td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1,043.2 </td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1,166.9 </td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1,314.6 </td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom">Deduct:</td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Losses and LAE payments made during current calendar year, net of reinsurance:</td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 24.25pt;text-align:left;vertical-align:bottom">Current accident year</td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">33.5 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">100.6 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">171.5 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">180.8 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 24.25pt;text-align:left;vertical-align:bottom">Prior accident years</td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">51.8 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">427.3 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">828.0 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">688.4 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Losses and LAE payments made during current calendar year, net of reinsurance:</td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">85.3 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">527.9 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">999.5 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">869.2 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom">Add/(Deduct):</td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Divestitures (1)</div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">24.4 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(35.2)</td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Reclassified to liabilities held-for-sale (2)</div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(313.0)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Net reserves ceded to Syndicate 1200 (2)</div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(129.6)</td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Deferred gain on U.S. loss portfolio transfer, net of amortization</td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(40.9)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Loss portfolio transfer:</td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24pt">U.S. (3)</div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(472.6)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24pt">Syndicate 1200 (for years of account 2019 and 2018) (4)</div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(144.0)</td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Reinsurance to close transaction (for years of account 2017 and prior) (5)</div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(219.7)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Retroactive reinsurance (6)</div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">21.7 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt">Change in participation interest (7)</div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">34.3 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">8.4 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom">Total net reserve adjustments</td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">— </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">5.2 </td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(1,060.1)</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(211.3)</td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Foreign exchange adjustments</td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">3.6 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">1.0 </td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(17.4)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">(17.0)</td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom">Net reserves - end of period</td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,747.1 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,734.6 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,213.1 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">3,123.2 </td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom">Add:</td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom">Reinsurance recoverables on unpaid losses and LAE, end of year</td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,797.4 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,791.8 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,838.5 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom">2,471.8 </td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom">Gross reserves - end of period</td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom">5,544.5 </td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom">5,526.4 </td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom">5,051.6 </td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom">$</td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom">5,595.0 </td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-top:6pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(1)For the period ended November 15, 2023, the adjustment relates to the year-to-date activity of Syndicate 1200 and on reinsurance contracts with AUA subsidiaries. Refer to the sale of Argo Underwriting Agency Limited in Note 2, “Recent Acquisitions, Disposals & Other Transactions” for additional information. For the period ended December 31, 2022, refer to the sale of Argo Seguros and AGSE in Note 2, “Recent Acquisitions, Disposals & Other Transactions” for additional information.</div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(2)Refer to the sale of Argo Underwriting Agency Limited in Note 2, “Recent Acquisitions, Disposals & Other Transactions” for additional information. Additionally, the Company reduced net reserves in the amount of $129.6 million for reinsurance contracts with AUA subsidiaries, which were reclassified to held-for-sale.</div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(3)Loss portfolio transfer of the Company’s U.S. casualty insurance reserves for accident years 2011 to 2019. Refer to Note 2, “Recent Acquisitions, Disposals & Other Transactions” for additional information.</div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(4)Loss portfolio transfer on Syndicate 1200's reserves for the 2018 and 2019 years of account. Refer to Note 2, “Recent Acquisitions, Disposals & Other Transactions” for additional information.</div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(5)Amount represents reserves ceded under the reinsurance to close transaction with RiverStone for Lloyd’s years of account 2017 and prior, effective January 1, 2021.</div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(6)In connection with the sale of AUA, the Company entered into two retroactive reinsurance agreements with AUA subsidiaries. </div><div style="margin-top:3pt;padding-left:9pt;text-align:justify;text-indent:-9pt">(7)Amount represents the change in reserves due to changing our participation in Syndicates 1200 and 1910.</div>

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Net

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2734600000

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CY2022Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2213100000

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CY2021Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

3123200000

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CY2020Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2906100000

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CY2023Q4

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Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

94200000

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us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

775300000

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CY2022

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Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

1102200000

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CY2021

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Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

1176300000

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CY2023Q4

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Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

0

usd

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Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

267900000

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CY2022

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Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

64700000

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CY2021

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Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

138300000

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CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

94200000

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Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1043200000

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CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1166900000

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CY2021

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Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1314600000

usd

CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

33500000

usd

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

100600000

usd

CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

171500000

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CY2021

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

180800000

usd

CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

51800000

usd

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

427300000

usd

CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

828000000.0

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CY2021

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Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

688400000

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CY2023Q4

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Payments For Losses And Loss Adjustment Expense

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85300000

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Payments For Losses And Loss Adjustment Expense

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527900000

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CY2022

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Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

999500000

usd

CY2021

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Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

869200000

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CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Divestiture Of Business

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDivestitureOfBusiness

0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Divestiture Of Business

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDivestitureOfBusiness

24400000

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CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Divestiture Of Business

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDivestitureOfBusiness

-35200000

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CY2021

argo

Liability For Unpaid Claims And Claims Adjustment Expense Divestiture Of Business

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDivestitureOfBusiness

0

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CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Reclassified

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0

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argo

Liability For Unpaid Claims And Claims Adjustment Expense Reclassified

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReclassified

0

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CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Reclassified

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReclassified

-313000000.0

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CY2021

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Liability For Unpaid Claims And Claims Adjustment Expense Reclassified

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReclassified

0

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CY2023Q4

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Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

0

usd

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

0

usd

CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

-129600000

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CY2021

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

0

usd

CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Deferred Gain On Loss Portfolio Transfer Net Of Amortization

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDeferredGainOnLossPortfolioTransferNetOfAmortization

0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Deferred Gain On Loss Portfolio Transfer Net Of Amortization

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDeferredGainOnLossPortfolioTransferNetOfAmortization

-40900000

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CY2022

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Liability For Unpaid Claims And Claims Adjustment Expense Deferred Gain On Loss Portfolio Transfer Net Of Amortization

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDeferredGainOnLossPortfolioTransferNetOfAmortization

0

usd

CY2021

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Liability For Unpaid Claims And Claims Adjustment Expense Deferred Gain On Loss Portfolio Transfer Net Of Amortization

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseDeferredGainOnLossPortfolioTransferNetOfAmortization

0

usd

CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Reinsurance To Close Transaction

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReinsuranceToCloseTransaction

0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Reinsurance To Close Transaction

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReinsuranceToCloseTransaction

0

usd

CY2022

argo

Liability For Unpaid Claims And Claims Adjustment Expense Reinsurance To Close Transaction

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReinsuranceToCloseTransaction

0

usd

CY2021

argo

Liability For Unpaid Claims And Claims Adjustment Expense Reinsurance To Close Transaction

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReinsuranceToCloseTransaction

-219700000

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CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Retroactive Reinsurance

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRetroactiveReinsurance

0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Retroactive Reinsurance

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRetroactiveReinsurance

21700000

usd

CY2022

argo

Liability For Unpaid Claims And Claims Adjustment Expense Retroactive Reinsurance

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRetroactiveReinsurance

0

usd

CY2021

argo

Liability For Unpaid Claims And Claims Adjustment Expense Retroactive Reinsurance

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRetroactiveReinsurance

0

usd

CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Change In Participation Interest

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0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Change In Participation Interest

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInParticipationInterest

0

usd

CY2022

argo

Liability For Unpaid Claims And Claims Adjustment Expense Change In Participation Interest

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInParticipationInterest

34300000

usd

CY2021

argo

Liability For Unpaid Claims And Claims Adjustment Expense Change In Participation Interest

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInParticipationInterest

8400000

usd

CY2023Q4

argo

Liability For Unpaid Claims And Claims Adjustment Expense Total Deductions

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0

usd

argo

Liability For Unpaid Claims And Claims Adjustment Expense Total Deductions

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5200000

usd

CY2022

argo

Liability For Unpaid Claims And Claims Adjustment Expense Total Deductions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTotalDeductions

-1060100000

usd

CY2021

argo

Liability For Unpaid Claims And Claims Adjustment Expense Total Deductions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTotalDeductions

-211300000

usd

CY2023Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-3600000

usd

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-1000000.0

usd

CY2022

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

17400000

usd

CY2021

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

17000000.0

usd

CY2023Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2747100000

usd

CY2023Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2734600000

usd

CY2022Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2213100000

usd

CY2021Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

3123200000

usd

CY2023Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2797400000

usd

CY2023Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2791800000

usd

CY2022Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2838500000

usd

CY2021Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2471800000

usd

CY2023Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5544500000

usd

CY2023Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5526400000

usd

CY2022Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5051600000

usd

CY2021Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5595000000

usd

CY2022

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

-129600000

usd

argo

Reinsurance Retroactive Agreements Entered Into Number

ReinsuranceRetroactiveAgreementsEnteredIntoNumber

2

agreement

CY2023

argo

Loss Adjustment Expenses Related To Pandemic

LossAdjustmentExpensesRelatedToPandemic

0

usd

CY2022

argo

Loss Adjustment Expenses Related To Pandemic

LossAdjustmentExpensesRelatedToPandemic

0

usd

CY2021

argo

Loss Adjustment Expenses Related To Pandemic

LossAdjustmentExpensesRelatedToPandemic

12400000

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

267900000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

64700000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

138300000

usd

CY2023

us-gaap

Number Of Reportable Segments

NumberOfReportableSegments

2

segment

CY2023

us-gaap

Number Of Reportable Segments

NumberOfReportableSegments

2

segment

CY2023Q4

us-gaap

Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net

ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet

2697200000

usd

CY2023Q4

us-gaap

Reinsurance Recoverable For Unpaid Claims And Claims Adjustments

ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments

2797400000

usd

CY2023Q4

us-gaap

Shortduration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense Accumulated Unallocated Claim Adjustment Expense

ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense

70700000

usd

CY2023Q4

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount

ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount

20800000

usd

CY2023Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5544500000

usd

CY2023

us-gaap

Number Of Operating Segments

NumberOfOperatingSegments

2

segment

CY2023Q4

us-gaap

Short Duration Contracts Discounted Liabilities Amount

ShortDurationContractsDiscountedLiabilitiesAmount

259400000

usd

CY2022Q4

us-gaap

Short Duration Contracts Discounted Liabilities Amount

ShortDurationContractsDiscountedLiabilitiesAmount

261000000.0

usd

CY2021Q4

us-gaap

Short Duration Contracts Discounted Liabilities Amount

ShortDurationContractsDiscountedLiabilitiesAmount

277400000

usd

CY2023Q4

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount

ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount

20800000

usd

CY2022Q4

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount

ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount

19300000

usd

CY2021Q4

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount

ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount

18800000

usd

CY2023Q4

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Interest Accretion

ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion

100000

usd

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Interest Accretion

ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion

1400000

usd

CY2022

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Interest Accretion

ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion

1800000

usd

CY2021

us-gaap

Shortduration Insurance Contracts Discounted Liabilities Interest Accretion

ShortdurationInsuranceContractsDiscountedLiabilitiesInterestAccretion

1100000

usd

CY2023Q4

us-gaap

Liability For Asbestos And Environmental Claims Gross

LiabilityForAsbestosAndEnvironmentalClaimsGross

59400000

usd

CY2022Q4

us-gaap

Liability For Asbestos And Environmental Claims Gross

LiabilityForAsbestosAndEnvironmentalClaimsGross

65500000

usd

CY2023Q4

argo

Gross Reserve For Discontinuation Of Certain Lines Of Business

GrossReserveForDiscontinuationOfCertainLinesOfBusiness

196100000

usd

CY2022Q4

argo

Gross Reserve For Discontinuation Of Certain Lines Of Business

GrossReserveForDiscontinuationOfCertainLinesOfBusiness

233100000

usd

CY2023Q4

argo

Asbestos And Environmental Underwriting Losses

AsbestosAndEnvironmentalUnderwritingLosses

-300000

usd

argo

Asbestos And Environmental Underwriting Losses

AsbestosAndEnvironmentalUnderwritingLosses

-1200000

usd

CY2022

argo

Asbestos And Environmental Underwriting Losses

AsbestosAndEnvironmentalUnderwritingLosses

-10500000

usd

CY2021

argo

Asbestos And Environmental Underwriting Losses

AsbestosAndEnvironmentalUnderwritingLosses

-14700000

usd

CY2023Q4

argo

Discontinued Operation Underwriting Losses Gains

DiscontinuedOperationUnderwritingLossesGains

700000

usd

argo

Discontinued Operation Underwriting Losses Gains

DiscontinuedOperationUnderwritingLossesGains

3200000

usd

CY2022

argo

Discontinued Operation Underwriting Losses Gains

DiscontinuedOperationUnderwritingLossesGains

3600000

usd

CY2021

argo

Discontinued Operation Underwriting Losses Gains

DiscontinuedOperationUnderwritingLossesGains

44700000

usd

CY2023Q4

us-gaap

Debt Instrument Face Amount

DebtInstrumentFaceAmount

143800000

usd

CY2022Q4

us-gaap

Debt Instrument Face Amount

DebtInstrumentFaceAmount

143800000

usd

CY2023Q4

us-gaap

Unamortized Debt Issuance Expense

UnamortizedDebtIssuanceExpense

15800000

usd

CY2022Q4

us-gaap

Unamortized Debt Issuance Expense

UnamortizedDebtIssuanceExpense

3300000

usd

CY2023Q4

us-gaap

Senior Notes

SeniorNotes

128000000.0

usd

CY2022Q4

us-gaap

Senior Notes

SeniorNotes

140500000

usd

CY2023Q4

argo

Depositary Shares Shares Issued

DepositarySharesSharesIssued

6000000

shares

CY2023Q4

argo

Depositary Share Liquidation Preference Per Share

DepositaryShareLiquidationPreferencePerShare

25

CY2023

argo

Preferred Stock Per Depositary Share Amounts Of Preferred Dividends

PreferredStockPerDepositaryShareAmountsOfPreferredDividends

1.75

CY2020Q3

argo

Depositary Share Liquidation Preference Per Share

DepositaryShareLiquidationPreferencePerShare

25

CY2020Q3

argo

Depositary Share Liquidation Preference Per Share

DepositaryShareLiquidationPreferencePerShare

25

CY2023

argo

Preferred Stock Per Depositary Share Amounts Of Preferred Dividends

PreferredStockPerDepositaryShareAmountsOfPreferredDividends

1.75

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2023Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

30000000

shares

CY2023Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

1.00

CY2023Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

6000

shares

CY2022Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

6000

shares

CY2022Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

6000

shares

CY2023Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

6000

shares

CY2023Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

2000000000

shares

CY2023Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1.00

CY2022

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2022

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

43400000

usd

CY2021

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2021

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

43900000

usd

CY2022

us-gaap

Treasury Stock Shares Acquired

TreasuryStockSharesAcquired

0

shares

us-gaap

Treasury Stock Shares Acquired

TreasuryStockSharesAcquired

0

shares

CY2022

us-gaap

Oci Before Reclassifications Net Of Tax Attributable To Parent

OciBeforeReclassificationsNetOfTaxAttributableToParent

-348600000

usd

CY2022

us-gaap

Reclassification From Aoci Current Period Net Of Tax Attributable To Parent

ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

-66200000

usd

CY2022

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

-282400000

usd

us-gaap

Oci Before Reclassifications Net Of Tax Attributable To Parent

OciBeforeReclassificationsNetOfTaxAttributableToParent

15500000

usd

us-gaap

Reclassification From Aoci Current Period Net Of Tax Attributable To Parent

ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

-22100000

usd

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

37600000

usd

CY2023Q4

us-gaap

Oci Before Reclassifications Net Of Tax Attributable To Parent

OciBeforeReclassificationsNetOfTaxAttributableToParent

51900000

usd

CY2023Q4

us-gaap

Reclassification From Aoci Current Period Net Of Tax Attributable To Parent

ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

100000

usd

CY2023Q4

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

51800000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

us-gaap

Net Income Loss

NetIncomeLoss

-210400000

usd

CY2022

us-gaap

Net Income Loss

NetIncomeLoss

-175200000

usd

CY2021

us-gaap

Net Income Loss

NetIncomeLoss

6700000

usd

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2022

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

CY2021

us-gaap

Preferred Stock Dividends Income Statement Impact

PreferredStockDividendsIncomeStatementImpact

10500000

usd

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-220900000

usd

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-220900000

usd

CY2022

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-185700000

usd

CY2022

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-185700000

usd

CY2021

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-3800000

usd

CY2021

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

-3800000

usd

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

35166679

shares

CY2022

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

34980608

shares

CY2021

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

34816160

shares

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

0

shares

CY2022

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

0

shares

CY2021

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

0

shares

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

35166679

shares

CY2022

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

34980608

shares

CY2021

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

34816160

shares

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.28

CY2022

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-5.31

CY2021

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-0.11

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.28

CY2022

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-5.31

CY2021

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-0.11

CY2021Q4

us-gaap

Treasury Stock Common Shares

TreasuryStockCommonShares

11318339

shares

CY2023Q4

us-gaap

Treasury Stock Common Shares

TreasuryStockCommonShares

11318339

shares

CY2022Q4

us-gaap

Treasury Stock Common Shares

TreasuryStockCommonShares

11318339

shares

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

47571

shares

CY2022

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

79276

shares

CY2021

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

208524

shares

CY2023

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

4300000

usd

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

1500000

usd

CY2023Q4

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

2800000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Noninterest Expense Commission Expense

NoninterestExpenseCommissionExpense

12700000

usd

us-gaap

Noninterest Expense Commission Expense

NoninterestExpenseCommissionExpense

141700000

usd

CY2022

us-gaap

Noninterest Expense Commission Expense

NoninterestExpenseCommissionExpense

280200000

usd

CY2021

us-gaap

Noninterest Expense Commission Expense

NoninterestExpenseCommissionExpense

289500000

usd

CY2023Q4

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

33800000

usd

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

268300000

usd

CY2022

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

401000000.0

usd

CY2021

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

428600000

usd

CY2023Q4

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

37900000

usd

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

0

usd

CY2022

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

0

usd

CY2021

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

0

usd

CY2023Q4

argo

Underwriting Acquisition And Insurance Expense Gross

UnderwritingAcquisitionAndInsuranceExpenseGross

84400000

usd

argo

Underwriting Acquisition And Insurance Expense Gross

UnderwritingAcquisitionAndInsuranceExpenseGross

410000000.0

usd

CY2022

argo

Underwriting Acquisition And Insurance Expense Gross

UnderwritingAcquisitionAndInsuranceExpenseGross

681200000

usd

CY2021

argo

Underwriting Acquisition And Insurance Expense Gross

UnderwritingAcquisitionAndInsuranceExpenseGross

718100000

usd

CY2023Q4

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

7200000

usd

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

-9000000.0

usd

CY2022

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

10500000

usd

CY2021

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

15800000

usd

CY2023Q4

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

77200000

usd

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

419000000.0

usd

CY2022

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

670700000

usd

CY2021

argo

Underwriting Acquisition And Insurance Expenses

UnderwritingAcquisitionAndInsuranceExpenses

702300000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

4200000

usd

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

15100000

usd

CY2022

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

-21000000.0

usd

CY2021

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

35400000

usd

CY2023Q4

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

-4200000

usd

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

100000

usd

CY2022

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

100000

usd

CY2021

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

2400000

usd

CY2023Q4

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

0

usd

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

-100000

usd

CY2022

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

-800000

usd

CY2021

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

-2200000

usd

CY2023Q4

argo

Current Income Tax Expense Benefit Other Jurisdictions

CurrentIncomeTaxExpenseBenefitOtherJurisdictions

0

usd

argo

Current Income Tax Expense Benefit Other Jurisdictions

CurrentIncomeTaxExpenseBenefitOtherJurisdictions

100000

usd

CY2022

argo

Current Income Tax Expense Benefit Other Jurisdictions

CurrentIncomeTaxExpenseBenefitOtherJurisdictions

-1700000

usd

CY2021

argo

Current Income Tax Expense Benefit Other Jurisdictions

CurrentIncomeTaxExpenseBenefitOtherJurisdictions

1600000

usd

CY2023Q4

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

0

usd

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

15200000

usd

CY2022

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

-23400000

usd

CY2021

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

37200000

usd

CY2023Q4

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

1300000

usd

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

-7900000

usd

CY2022

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

6000000.0

usd

CY2021

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

-26300000

usd

CY2023Q4

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

0

usd

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-7000000.0

usd

CY2022

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

7300000

usd

CY2021

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-12300000

usd

CY2023Q4

argo

Deferred Income Tax Expense Benefit Other Jurisdictions

DeferredIncomeTaxExpenseBenefitOtherJurisdictions

0

usd

argo

Deferred Income Tax Expense Benefit Other Jurisdictions

DeferredIncomeTaxExpenseBenefitOtherJurisdictions

0

usd

CY2022

argo

Deferred Income Tax Expense Benefit Other Jurisdictions

DeferredIncomeTaxExpenseBenefitOtherJurisdictions

2100000

usd

CY2021

argo

Deferred Income Tax Expense Benefit Other Jurisdictions

DeferredIncomeTaxExpenseBenefitOtherJurisdictions

0

usd

CY2023Q4

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

1300000

usd

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-14900000

usd

CY2022

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

15400000

usd

CY2021

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-38600000

usd

CY2023Q4

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

1300000

usd

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

300000

usd

CY2022

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-8000000.0

usd

CY2021

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-1400000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

2200000

usd

CY2023Q4

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.591

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-210100000

usd

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.001

CY2022

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-183200000

usd

CY2022

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.043

CY2021

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

5300000

usd

CY2021

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

-0.264

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

2900000

usd

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-24700000

usd

CY2022

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-14700000

usd

CY2021

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

9800000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

0

usd

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

100000

usd

CY2022

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

400000

usd

CY2021

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

500000

usd

CY2023Q4

argo

Income Tax Reconciliation Foreign Exchange Adjustments

IncomeTaxReconciliationForeignExchangeAdjustments

0

usd

argo

Income Tax Reconciliation Foreign Exchange Adjustments

IncomeTaxReconciliationForeignExchangeAdjustments

-2600000

usd

CY2022

argo

Income Tax Reconciliation Foreign Exchange Adjustments

IncomeTaxReconciliationForeignExchangeAdjustments

-2100000

usd

CY2021

argo

Income Tax Reconciliation Foreign Exchange Adjustments

IncomeTaxReconciliationForeignExchangeAdjustments

-700000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Nondeductible Expense Impairment Losses

IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses

0

usd

us-gaap

Income Tax Reconciliation Nondeductible Expense Impairment Losses

IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses

0

usd

CY2022

us-gaap

Income Tax Reconciliation Nondeductible Expense Impairment Losses

IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses

5400000

usd

CY2021

us-gaap

Income Tax Reconciliation Nondeductible Expense Impairment Losses

IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses

8200000

usd

CY2023Q4

us-gaap

Effective Income Tax Rate Reconciliation Beat Amount

EffectiveIncomeTaxRateReconciliationBeatAmount

0

usd

us-gaap

Effective Income Tax Rate Reconciliation Beat Amount

EffectiveIncomeTaxRateReconciliationBeatAmount

23500000

usd

CY2022

us-gaap

Effective Income Tax Rate Reconciliation Beat Amount

EffectiveIncomeTaxRateReconciliationBeatAmount

0

usd

CY2021

us-gaap

Effective Income Tax Rate Reconciliation Beat Amount

EffectiveIncomeTaxRateReconciliationBeatAmount

0

usd

CY2023Q4

argo

Income Tax Reconciliation Withholding Taxes

IncomeTaxReconciliationWithholdingTaxes

0

usd

argo

Income Tax Reconciliation Withholding Taxes

IncomeTaxReconciliationWithholdingTaxes

100000

usd

CY2022

argo

Income Tax Reconciliation Withholding Taxes

IncomeTaxReconciliationWithholdingTaxes

2700000

usd

CY2021

argo

Income Tax Reconciliation Withholding Taxes

IncomeTaxReconciliationWithholdingTaxes

100000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

100000

usd

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

-1200000

usd

CY2022

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

0

usd

CY2021

us-gaap

Income Tax Reconciliation State And Local Income Taxes

IncomeTaxReconciliationStateAndLocalIncomeTaxes

0

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Tax Contingencies

IncomeTaxReconciliationTaxContingencies

-3400000

usd

us-gaap

Income Tax Reconciliation Tax Contingencies

IncomeTaxReconciliationTaxContingencies

1200000

usd

CY2022

us-gaap

Income Tax Reconciliation Tax Contingencies

IncomeTaxReconciliationTaxContingencies

-1400000

usd

CY2021

us-gaap

Income Tax Reconciliation Tax Contingencies

IncomeTaxReconciliationTaxContingencies

-4500000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

1800000

usd

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-1400000

usd

CY2022

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-7600000

usd

CY2021

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-700000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

-200000

usd

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

-200000

usd

CY2022

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

1700000

usd

CY2021

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

-8300000

usd

CY2023Q4

argo

Effective Income Tax Reconciliation Premiums And Underwriting Amount

EffectiveIncomeTaxReconciliationPremiumsAndUnderwritingAmount

0

usd

argo

Effective Income Tax Reconciliation Premiums And Underwriting Amount

EffectiveIncomeTaxReconciliationPremiumsAndUnderwritingAmount

0

usd

CY2022

argo

Effective Income Tax Reconciliation Premiums And Underwriting Amount

EffectiveIncomeTaxReconciliationPremiumsAndUnderwritingAmount

300000

usd

CY2021

argo

Effective Income Tax Reconciliation Premiums And Underwriting Amount

EffectiveIncomeTaxReconciliationPremiumsAndUnderwritingAmount

-5300000

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Disposition Of Business

IncomeTaxReconciliationDispositionOfBusiness

0

usd

us-gaap

Income Tax Reconciliation Disposition Of Business

IncomeTaxReconciliationDispositionOfBusiness

0

usd

CY2022

us-gaap

Income Tax Reconciliation Disposition Of Business

IncomeTaxReconciliationDispositionOfBusiness

6600000

usd

CY2021

us-gaap

Income Tax Reconciliation Disposition Of Business

IncomeTaxReconciliationDispositionOfBusiness

0

usd

CY2023Q4

argo

Effective Income Tax Rate Reconciliation Excess Executive Compensation

EffectiveIncomeTaxRateReconciliationExcessExecutiveCompensation

0

usd

argo

Effective Income Tax Rate Reconciliation Excess Executive Compensation

EffectiveIncomeTaxRateReconciliationExcessExecutiveCompensation

2000000.0

usd

CY2022

argo

Effective Income Tax Rate Reconciliation Excess Executive Compensation

EffectiveIncomeTaxRateReconciliationExcessExecutiveCompensation

0

usd

CY2021

argo

Effective Income Tax Rate Reconciliation Excess Executive Compensation

EffectiveIncomeTaxRateReconciliationExcessExecutiveCompensation

0

usd

CY2023Q4

us-gaap

Income Tax Reconciliation Other Adjustments

IncomeTaxReconciliationOtherAdjustments

100000

usd

us-gaap

Income Tax Reconciliation Other Adjustments

IncomeTaxReconciliationOtherAdjustments

3700000

usd

CY2022

us-gaap

Income Tax Reconciliation Other Adjustments

IncomeTaxReconciliationOtherAdjustments

1500000

usd

CY2021

us-gaap

Income Tax Reconciliation Other Adjustments

IncomeTaxReconciliationOtherAdjustments

500000

usd

CY2023Q4

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

1300000

usd

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

300000

usd

CY2022

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-8000000.0

usd

CY2021

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-1400000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

45500000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

31400000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

23900000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

26500000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

36300000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

26500000

usd

CY2023Q4

argo

Deferred Tax Assets Investment In Limited Partnership Interests

DeferredTaxAssetsInvestmentInLimitedPartnershipInterests

9300000

usd

CY2022Q4

argo

Deferred Tax Assets Investment In Limited Partnership Interests

DeferredTaxAssetsInvestmentInLimitedPartnershipInterests

14000000.0

usd

CY2023Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Trading Securities

DeferredTaxAssetsUnrealizedLossesOnTradingSecurities

6900000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Trading Securities

DeferredTaxAssetsUnrealizedLossesOnTradingSecurities

8200000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross

42300000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross

63600000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Investments

DeferredTaxAssetsInvestments

4900000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Investments

DeferredTaxAssetsInvestments

0

usd

CY2023Q4

argo

Deferred Tax Assets Rightof Use Assets

DeferredTaxAssetsRightofUseAssets

10600000

usd

CY2022Q4

argo

Deferred Tax Assets Rightof Use Assets

DeferredTaxAssetsRightofUseAssets

12800000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses

5500000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses

6900000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

0

usd

CY2022Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

900000

usd

CY2023Q4

argo

Deferred Tax Assets Bad Debt

DeferredTaxAssetsBadDebt

3200000

usd

CY2022Q4

argo

Deferred Tax Assets Bad Debt

DeferredTaxAssetsBadDebt

1900000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

2600000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

4300000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

191000000.0

usd

CY2022Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

197000000.0

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Unrealized Gains On Trading Securities

DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities

6400000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Unrealized Gains On Trading Securities

DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities

0

usd

CY2023Q4

argo

Deferred Tax Liability Unrealized Gains Losses On Limited Partnership Securities

DeferredTaxLiabilityUnrealizedGainsLossesOnLimitedPartnershipSecurities

24800000

usd

CY2022Q4

argo

Deferred Tax Liability Unrealized Gains Losses On Limited Partnership Securities

DeferredTaxLiabilityUnrealizedGainsLossesOnLimitedPartnershipSecurities

25300000

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

5800000

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

DeferredTaxLiabilitiesPropertyPlantAndEquipment

7300000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

DeferredTaxLiabilitiesPropertyPlantAndEquipment

7100000

usd

CY2023Q4

argo

Deferred Tax Liabilities Acquisition Cost

DeferredTaxLiabilitiesAcquisitionCost

500000

usd

CY2022Q4

argo

Deferred Tax Liabilities Acquisition Cost

DeferredTaxLiabilitiesAcquisitionCost

23000000.0

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Leasing Arrangements

DeferredTaxLiabilitiesLeasingArrangements

12100000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Leasing Arrangements

DeferredTaxLiabilitiesLeasingArrangements

11000000.0

usd

CY2023Q4

argo

Deferred Tax Liabilities Tax Cuts And Jobs Act Of2017 Reserve Transitional Liability

DeferredTaxLiabilitiesTaxCutsAndJobsActOf2017ReserveTransitionalLiability

1100000

usd

CY2022Q4

argo

Deferred Tax Liabilities Tax Cuts And Jobs Act Of2017 Reserve Transitional Liability

DeferredTaxLiabilitiesTaxCutsAndJobsActOf2017ReserveTransitionalLiability

1600000

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

32200000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

0

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets

DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

37100000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets

DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

0

usd

CY2023Q4

argo

Deferred Tax Liabilities Underwriting Results

DeferredTaxLiabilitiesUnderwritingResults

9100000

usd

CY2022Q4

argo

Deferred Tax Liabilities Underwriting Results

DeferredTaxLiabilitiesUnderwritingResults

0

usd

CY2023Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

600000

usd

CY2022Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

1700000

usd

CY2023Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

131200000

usd

CY2022Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

75500000

usd

CY2023Q4

argo

Deferred Tax Assets Liabilities Gross

DeferredTaxAssetsLiabilitiesGross

59800000

usd

CY2022Q4

argo

Deferred Tax Assets Liabilities Gross

DeferredTaxAssetsLiabilitiesGross

121500000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

20700000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

20300000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

39100000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

101200000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

39100000

usd

CY2022Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

101200000

usd

CY2023

argo

Net Operating Losses Carry Back Period

NetOperatingLossesCarryBackPeriod

P2Y

CY2023

argo

Capital Losses Carry Back Period

CapitalLossesCarryBackPeriod

P3Y

CY2023

us-gaap

Valuation Allowance Deferred Tax Asset Change In Amount

ValuationAllowanceDeferredTaxAssetChangeInAmount

400000

usd

CY2023Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

39100000

usd

CY2023Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

0

usd

CY2022Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

4600000

usd

CY2023

us-gaap

Unrecognized Tax Benefits Interest On Income Taxes Expense

UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense

-400000

usd

CY2022

us-gaap

Unrecognized Tax Benefits Interest On Income Taxes Expense

UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense

600000

usd

CY2021

us-gaap

Unrecognized Tax Benefits Interest On Income Taxes Expense

UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense

-1000000.0

usd

CY2023

us-gaap

Unrecognized Tax Benefits Income Tax Penalties Expense

UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense

0

usd

CY2022

us-gaap

Unrecognized Tax Benefits Income Tax Penalties Expense

UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense

100000

usd

CY2021

us-gaap

Unrecognized Tax Benefits Income Tax Penalties Expense

UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense

-800000

usd

CY2022Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

4600000

usd

CY2021Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

3600000

usd

CY2023

us-gaap

Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions

0

usd

CY2022

us-gaap

Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions

3000000.0

usd

CY2023

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions

1000000.0

usd

CY2022

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions

1400000

usd

CY2023

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities

UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

2400000

usd

CY2022

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities

UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

0

usd

CY2023

us-gaap

Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations

UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations

1200000

usd

CY2022

us-gaap

Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations

UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations

600000

usd

CY2023Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

0

usd

CY2022Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

4600000

usd

CY2023Q4

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

100000

usd

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

800000

usd

CY2022

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

100000

usd

CY2021

us-gaap

Defined Benefit Plan Net Periodic Benefit Cost

DefinedBenefitPlanNetPeriodicBenefitCost

100000

usd

CY2023

us-gaap

Number Of Reportable Segments

NumberOfReportableSegments

2

segment

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Premiums Earned Net

PremiumsEarnedNet

162300000

usd

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1225900000

usd

CY2022

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1740400000

usd

CY2021

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1910100000

usd

CY2023Q4

us-gaap

Net Investment Income

NetInvestmentIncome

28600000

usd

us-gaap

Net Investment Income

NetInvestmentIncome

121300000

usd

CY2022

us-gaap

Net Investment Income

NetInvestmentIncome

129800000

usd

CY2021

us-gaap

Net Investment Income

NetInvestmentIncome

187600000

usd

CY2023Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-300000

usd

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-22700000

usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-115300000

usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

32600000

usd

CY2023Q4

us-gaap

Revenues

190600000

usd

us-gaap

Revenues

1324500000

usd

CY2022

us-gaap

Revenues

1754900000

usd

CY2021

us-gaap

Revenues

2130300000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-300000

usd

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-22700000

usd

CY2022

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-115300000

usd

CY2021

us-gaap

Gain Loss On Investments

GainLossOnInvestments

32600000

usd

CY2023Q4

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-600000

usd

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-1800000

usd

CY2022

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

5000000.0

usd

CY2021

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-1600000

usd

CY2023Q4

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

0

usd

CY2022

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

28500000

usd

CY2021

us-gaap

Goodwill And Intangible Asset Impairment

GoodwillAndIntangibleAssetImpairment

43200000

usd

CY2023Q4

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

13100000

usd

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

41100000

usd

CY2022

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

51500000

usd

CY2021

us-gaap

Other Nonoperating Expense

OtherNonoperatingExpense

43700000

usd

CY2023Q4

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

2200000

usd

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-210100000

usd

CY2022

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-183200000

usd

CY2021

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

5300000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Premiums Earned Net

PremiumsEarnedNet

162300000

usd

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1225900000

usd

CY2022

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1740400000

usd

CY2021

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1910100000

usd

CY2023Q4

us-gaap

Assets

8503100000

usd

CY2022Q4

us-gaap

Assets

10034400000

usd

CY2022Q4

argo

Assets Associated With Trade Capital Providers

AssetsAssociatedWithTradeCapitalProviders

303700000

usd

CY2023Q4

us-gaap

Goodwill

0

usd

CY2022Q4

us-gaap

Goodwill

118600000

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

324200000

usd

CY2022Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

0

usd

CY2023Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

362100000

usd

CY2022

us-gaap

Impairment Of Intangible Assets Indefinitelived Excluding Goodwill

ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill

17300000

usd

CY2022

us-gaap

Goodwill Impairment Loss

GoodwillImpairmentLoss

11200000

usd

CY2023Q4

us-gaap

Loss Contingency Discounted Amount Of Insurance Related Assessment Liability

LossContingencyDiscountedAmountOfInsuranceRelatedAssessmentLiability

6900000

usd

CY2022Q4

us-gaap

Loss Contingency Discounted Amount Of Insurance Related Assessment Liability

LossContingencyDiscountedAmountOfInsuranceRelatedAssessmentLiability

5200000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

7200000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves

SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves

5544500000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Unearned Premiums

SupplementaryInsuranceInformationUnearnedPremiums

916600000

usd

CY2022Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

107000000.0

usd

CY2022Q4

us-gaap

Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves

SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves

5051600000

usd

CY2022Q4

us-gaap

Supplementary Insurance Information Unearned Premiums

SupplementaryInsuranceInformationUnearnedPremiums

1039900000

usd

CY2021Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

168000000.0

usd

CY2021Q4

us-gaap

Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves

SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves

5595000000

usd

CY2021Q4

us-gaap

Supplementary Insurance Information Unearned Premiums

SupplementaryInsuranceInformationUnearnedPremiums

1466800000

usd

CY2023Q4

us-gaap

Premiums Earned Net

PremiumsEarnedNet

162300000

usd

CY2023Q4

us-gaap

Net Investment Income

NetInvestmentIncome

28600000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

94200000

usd

CY2023Q4

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

7200000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Other Policy Claims And Benefits Payable

SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable

84400000

usd

CY2023Q4

us-gaap

Premiums Written Net

PremiumsWrittenNet

124300000

usd

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1225900000

usd

us-gaap

Net Investment Income

NetInvestmentIncome

121300000

usd

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1043200000

usd

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

-9000000.0

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Other Policy Claims And Benefits Payable

SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable

410000000.0

usd

us-gaap

Premiums Written Net

PremiumsWrittenNet

1144700000

usd

CY2022

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1740400000

usd

CY2022

us-gaap

Net Investment Income

NetInvestmentIncome

129800000

usd

CY2022

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1166900000

usd

CY2022

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

10500000

usd

CY2022Q4

us-gaap

Supplementary Insurance Information Other Policy Claims And Benefits Payable

SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable

681200000

usd

CY2022

us-gaap

Premiums Written Net

PremiumsWrittenNet

1741500000

usd

CY2021

us-gaap

Premiums Earned Net

PremiumsEarnedNet

1910100000

usd

CY2021

us-gaap

Net Investment Income

NetInvestmentIncome

187600000

usd

CY2021

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1314600000

usd

CY2021

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

15800000

usd

CY2021Q4

us-gaap

Supplementary Insurance Information Other Policy Claims And Benefits Payable

SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable

718100000

usd

CY2021

us-gaap

Premiums Written Net

PremiumsWrittenNet

1977300000

usd

CY2022Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

20300000

usd

CY2023

us-gaap

Valuation Allowances And Reserves Charged To Cost And Expense

ValuationAllowancesAndReservesChargedToCostAndExpense

0

usd

CY2023

argo

Valuation Allowances And Reserves Capital Loss Carryforward

ValuationAllowancesAndReservesCapitalLossCarryforward

0

usd

CY2023

argo

Valuation Allowances And Reserves Operating Loss Carryforward Net

ValuationAllowancesAndReservesOperatingLossCarryforwardNet

400000

usd

CY2023

argo

Valuation Allowances And Reserves Adjustment

ValuationAllowancesAndReservesAdjustment

0

usd

CY2023

us-gaap

Valuation Allowances And Reserves Deductions

ValuationAllowancesAndReservesDeductions

0

usd

CY2023Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

20700000

usd

CY2021Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

27900000

usd

CY2022

us-gaap

Valuation Allowances And Reserves Charged To Cost And Expense

ValuationAllowancesAndReservesChargedToCostAndExpense

0

usd

CY2022

argo

Valuation Allowances And Reserves Capital Loss Carryforward

ValuationAllowancesAndReservesCapitalLossCarryforward

3300000

usd

CY2022

argo

Valuation Allowances And Reserves Operating Loss Carryforward Net

ValuationAllowancesAndReservesOperatingLossCarryforwardNet

-10900000

usd

CY2022

argo

Valuation Allowances And Reserves Adjustment

ValuationAllowancesAndReservesAdjustment

0

usd

CY2022

us-gaap

Valuation Allowances And Reserves Deductions

ValuationAllowancesAndReservesDeductions

0

usd

CY2022Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

20300000

usd

CY2020Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

28600000

usd

CY2021

us-gaap

Valuation Allowances And Reserves Charged To Cost And Expense

ValuationAllowancesAndReservesChargedToCostAndExpense

700000

usd

CY2021

argo

Valuation Allowances And Reserves Capital Loss Carryforward

ValuationAllowancesAndReservesCapitalLossCarryforward

0

usd

CY2021

argo

Valuation Allowances And Reserves Operating Loss Carryforward Net

ValuationAllowancesAndReservesOperatingLossCarryforwardNet

0

usd

CY2021

argo

Valuation Allowances And Reserves Adjustment

ValuationAllowancesAndReservesAdjustment

0

usd

CY2021

us-gaap

Valuation Allowances And Reserves Deductions

ValuationAllowancesAndReservesDeductions

0

usd

CY2021Q4

us-gaap

Valuation Allowances And Reserves Balance

ValuationAllowancesAndReservesBalance

27900000

usd

CY2023Q4

us-gaap

Financial Designation Predecessor And Successor Fixed List

FinancialDesignationPredecessorAndSuccessorFixedList

Successor

CY2023Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

7200000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

88700000

usd

CY2022Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

107000000.0

usd

CY2021Q4

us-gaap

Supplementary Insurance Information Deferred Policy Acquisition Costs

SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts

168000000.0

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Reserves For Unpaid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense

5544500000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Reserves For Unpaid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense

5526400000

usd

CY2022Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Reserves For Unpaid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense

5051600000

usd

CY2021Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Reserves For Unpaid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense

5595000000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Discount Deducted From Reserves

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves

20800000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Discount Deducted From Reserves

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves

20400000

usd

CY2022Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Discount Deducted From Reserves

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves

19300000

usd

CY2021Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Discount Deducted From Reserves

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves

18800000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Unearned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

916600000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Unearned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

986200000

usd

CY2022Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Unearned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

1039900000

usd

CY2021Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Unearned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

1466800000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Earned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersEarnedPremiums

162300000

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Earned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersEarnedPremiums

1225900000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Earned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersEarnedPremiums

1740400000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Earned Premiums

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersEarnedPremiums

1910100000

usd

CY2023Q4

us-gaap

Net Investment Income

NetInvestmentIncome

28600000

usd

us-gaap

Net Investment Income

NetInvestmentIncome

121300000

usd

CY2022

us-gaap

Net Investment Income

NetInvestmentIncome

129800000

usd

CY2021

us-gaap

Net Investment Income

NetInvestmentIncome

187600000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

94200000

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

775300000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

1102200000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

1176300000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

0

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

267900000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

64700000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

138300000

usd

CY2023Q4

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

94200000

usd

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1043200000

usd

CY2022

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1166900000

usd

CY2021

us-gaap

Supplementary Insurance Information Benefits Claims Losses And Settlement Expense

SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense

1314600000

usd

CY2023Q4

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

7200000

usd

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

-9000000.0

usd

CY2022

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

10500000

usd

CY2021

argo

Net Supplementary Insurance Information Amortization Deferral Of Deferred Policy Acquisition Costs

NetSupplementaryInsuranceInformationAmortizationDeferralOfDeferredPolicyAcquisitionCosts

15800000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Paid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense

85300000

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Paid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense

527900000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Paid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense

999500000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Paid Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense

869200000

usd

CY2023Q4

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Premiums Written

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPremiumsWritten

191200000

usd

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Premiums Written

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPremiumsWritten

1948400000

usd

CY2022

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Premiums Written

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPremiumsWritten

2848100000

usd

CY2021

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Premiums Written

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPremiumsWritten

3181200000

usd

Concept	2024 Q1	2023 Q4	2022 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$462.4M	$45.80M	$50.20M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment		$31.10M	$43.60M
YoY Change		-28.67%	-35.41%
Goodwill		$0.00	$118.6M
YoY Change		-100.0%	-19.48%
Intangibles	$170.3M	$362.1M	$0.00
YoY Change			-100.0%
Long-Term Investments			$3.652B
YoY Change			-31.39%
Other Assets			$2.167B
YoY Change			2844.84%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$8.647B	$8.503B	$10.03B
YoY Change	5.4%	-15.26%	-2.75%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses			$187.7M
YoY Change			-28.98%
Deferred Revenue
YoY Change
Short-Term Debt			$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities			$187.7M
YoY Change			-28.98%
LONG-TERM LIABILITIES
Long-Term Debt			$399.1M
YoY Change			-12.38%
Other Long-Term Liabilities			$1.915B
YoY Change
Total Long-Term Liabilities			$2.314B
YoY Change			407.93%
TOTAL LIABILITIES
Total Short-Term Liabilities			$187.7M
Total Long-Term Liabilities			$2.314B
Total Liabilities	$7.243B	$7.206B	$8.802B
YoY Change	4.07%	-18.13%	2.55%
SHAREHOLDERS EQUITY
Retained Earnings	$23.90M	$900.0K	$407.3M
YoY Change	-93.56%	-99.78%	-36.0%
Common Stock	$1.208B	$1.108B	$1.442B
YoY Change	-16.31%	-23.17%	0.64%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.405B	$1.298B	$1.233B
YoY Change
Total Liabilities & Shareholders Equity	$8.647B	$8.503B	$10.03B
YoY Change	5.4%	-15.26%	-2.75%

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Argo Group International Holdings, Inc. Stock $argd

2024 Q1 Form 10-K Financial Statement

#000162828024011791 Filed on March 19, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

Name	View Source	Status
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argo-20231231.xsd	Edgar Link	pending
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ex32112312023.htm	Edgar Link	pending
ex32212312023.htm	Edgar Link	pending
exhibit44.htm	Edgar Link	pending
exhibit44001.jpg	Edgar Link	pending
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$ARGD Argo Group International Holdings, Inc. Stock $argd

2024 Q1 Form 10-K Financial Statement

#000162828024011791 Filed on March 19, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ARGD
Argo Group International Holdings, Inc. Stock $argd