$SPNT
SiriusPoint Ltd Stock $spnt

$spnt Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000157601824000054 Filed on October 31, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$562.2M
YoY Change		-19.98%
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		$3.000M
YoY Change		3.45%
% of Gross Profit
Operating Expenses		$534.3M
YoY Change		-11.76%
Operating Profit
YoY Change
Interest Expense		$13.80M
YoY Change		-30.3%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income		$11.10M
YoY Change		-85.97%
Income Tax		$2.400M
% Of Pretax Income		21.62%
Net Earnings		$8.500M
YoY Change		-86.18%
Net Earnings / Revenue		1.51%
Basic Earnings Per Share		$0.03
Diluted Earnings Per Share		$0.03
COMMON SHARES
Basic Shares Outstanding	161.9M shares	170.9M shares
Diluted Shares Outstanding		172.8M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$640.7M
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		$22.00M
YoY Change		-15.38%
Goodwill
YoY Change
Intangibles		$143.8M
YoY Change		-7.58%
Long-Term Investments		$6.048B
YoY Change		0.36%
Other Assets		$423.7M
YoY Change		47.12%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets		$12.68B
YoY Change		0.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable		$242.6M
YoY Change		-0.57%
Accrued Expenses		$24.90M
YoY Change		-17.0%
Deferred Revenue
YoY Change
Short-Term Debt		$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$267.5M
YoY Change		-14.54%
LONG-TERM LIABILITIES
Long-Term Debt		$660.5M
YoY Change		-13.55%
Other Long-Term Liabilities		$100.3M
YoY Change		-55.22%
Total Long-Term Liabilities		$760.8M
YoY Change		-23.0%
TOTAL LIABILITIES
Total Short-Term Liabilities		$267.5M
Total Long-Term Liabilities		$760.8M
Total Liabilities		$9.986B
YoY Change		-3.29%
SHAREHOLDERS EQUITY
Retained Earnings		$806.2M
YoY Change		58.86%
Common Stock		$16.20M
YoY Change		-1.82%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$2.695B
YoY Change
Total Liabilities & Shareholders Equity		$12.68B
YoY Change		0.73%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$8.500M
YoY Change		-86.18%
Depreciation, Depletion And Amortization		$3.000M
YoY Change		3.45%
Cash From Operating Activities		$58.10M
YoY Change		-64.05%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities		$202.1M
YoY Change		-306.65%
Cash From Investing Activities		$202.1M
YoY Change		-306.65%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-169.0M
YoY Change		604.17%
NET CHANGE
Cash From Operating Activities		58.10M
Cash From Investing Activities		202.1M
Cash From Financing Activities		-169.0M
Net Change In Cash		91.20M
YoY Change		129.15%
FREE CASH FLOW
Cash From Operating Activities		$58.10M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001576018
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2696500000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2265400000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2696500000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2265400000	usd
	us-gaap	Profit Loss ProfitLoss	219400000	usd
	us-gaap	Profit Loss ProfitLoss	264000000.0	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	15900000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	15700000	usd
	spnt	Realized And Unrealized Gain Loss On Investments And Derivatives RealizedAndUnrealizedGainLossOnInvestmentsAndDerivatives	-48000000.0	usd
	spnt	Realized And Unrealized Gain Loss On Investments And Derivatives RealizedAndUnrealizedGainLossOnInvestmentsAndDerivatives	-1800000	usd
	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	8900000	usd
	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	0	usd
	spnt	Accretion Amortization Of Discounts And Premiums AccretionAmortizationOfDiscountsAndPremiums	49800000	usd
	spnt	Accretion Amortization Of Discounts And Premiums AccretionAmortizationOfDiscountsAndPremiums	57500000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8900000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8200000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	26300000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	9500000	usd
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	102800000	usd
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	174800000	usd
	spnt	Increase Decrease In Deferred Policy Acquisition Costs And Present Value Of Future Insurance Profits IncreaseDecreaseInDeferredPolicyAcquisitionCostsAndPresentValueOfFutureInsuranceProfits	21100000	usd
	spnt	Increase Decrease In Deferred Policy Acquisition Costs And Present Value Of Future Insurance Profits IncreaseDecreaseInDeferredPolicyAcquisitionCostsAndPresentValueOfFutureInsuranceProfits	38100000	usd
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-190400000	usd
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	757900000	usd
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-800000	usd
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-41100000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	127100000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33300000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	7100000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	14400000	usd
	spnt	Proceeds From Payments For Broker Dealer Related Receivables And Payables Net Investing Activities ProceedsFromPaymentsForBrokerDealerRelatedReceivablesAndPayablesNetInvestingActivities	8600000	usd
	spnt	Proceeds From Payments For Broker Dealer Related Receivables And Payables Net Investing Activities ProceedsFromPaymentsForBrokerDealerRelatedReceivablesAndPayablesNetInvestingActivities	22500000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	140400000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-395300000	usd
	spnt	Payments For Settlement Of Financial Instruments Subject To Mandatory Redemption PaymentsForSettlementOfFinancialInstrumentsSubjectToMandatoryRedemption	40800000	usd
	spnt	Payments For Settlement Of Financial Instruments Subject To Mandatory Redemption PaymentsForSettlementOfFinancialInstrumentsSubjectToMandatoryRedemption	38500000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	4755400000	usd
CY2024Q3	us-gaap	Other Long Term Investments OtherLongTermInvestments	236100000	usd
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Registrant Name EntityRegistrantName	SIRIUSPOINT LTD.
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	161866867	shares
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	us-gaap	Undistributed Earnings UndistributedEarnings	245300000	usd
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	245300000	usd
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	200000	usd
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-200000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-393500000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-75100000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-286100000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-102500000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1101300000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	913700000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	16800000	usd
CY2024Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1591000000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1693000000	usd
CY2024Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	806200000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	601000000.0	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	81500000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	3100000	usd
CY2024Q3	us-gaap	Stockholders Equity StockholdersEquity	2694900000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	2513900000	usd
CY2024Q3	us-gaap	Minority Interest MinorityInterest	1600000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	16700000	usd
CY2024Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12682500000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2200000	usd
	us-gaap	Net Income Loss NetIncomeLoss	217200000	usd
	us-gaap	Net Income Loss NetIncomeLoss	257300000	usd
CY2024Q3	us-gaap	Dividends Dividends	4000000.0	usd
CY2023Q3	us-gaap	Dividends Dividends	4000000.0	usd
	us-gaap	Dividends Dividends	12000000.0	usd
CY2024Q3	us-gaap	Undistributed Earnings UndistributedEarnings	4500000	usd
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	205200000	usd
	us-gaap	Net Investment Income NetInvestmentIncome	205300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56600000	usd
	us-gaap	Profit Loss ProfitLoss	264000000.0	usd
	us-gaap	Net Income Loss NetIncomeLoss	257300000	usd
	us-gaap	Loss Ratio LossRatio	0.550
	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.195
	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.071
	us-gaap	Combined Ratio CombinedRatio	0.816
	spnt	Gain Loss On Sale Of Other Long Term Investments GainLossOnSaleOfOtherLongTermInvestments	8500000	usd
CY2023Q3	spnt	Cash And Cash Equivalents Realized Gain Loss CashAndCashEquivalentsRealizedGainLoss	-2200000	usd
	spnt	Cash And Cash Equivalents Realized Gain Loss CashAndCashEquivalentsRealizedGainLoss	1800000	usd
	spnt	Cash And Cash Equivalents Realized Gain Loss CashAndCashEquivalentsRealizedGainLoss	2200000	usd
CY2024Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	7600000	usd
CY2023Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	4100000	usd
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-15700000	usd
	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	15700000	usd
	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	52100000	usd
CY2023Q3	spnt	Other Short Term Investments Unrealized Gain Loss OtherShortTermInvestmentsUnrealizedGainLoss	100000	usd
	spnt	Other Short Term Investments Unrealized Gain Loss OtherShortTermInvestmentsUnrealizedGainLoss	-700000	usd
	spnt	Other Short Term Investments Unrealized Gain Loss OtherShortTermInvestmentsUnrealizedGainLoss	800000	usd
CY2023Q3	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-16000000.0	usd
CY2023Q3	spnt	Cash And Cash Equivalents Unrealized Gain Loss CashAndCashEquivalentsUnrealizedGainLoss	3700000	usd
	spnt	Cash And Cash Equivalents Unrealized Gain Loss CashAndCashEquivalentsUnrealizedGainLoss	-1700000	usd
	spnt	Cash And Cash Equivalents Unrealized Gain Loss CashAndCashEquivalentsUnrealizedGainLoss	1300000	usd
CY2024Q3	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-700000	usd
CY2023Q3	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-11200000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-32300000	usd
CY2024Q3	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-6500000	usd
CY2023Q3	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-16000000.0	usd
	spnt	Noncontrolling Interest Increase Decrease From Derecognition NoncontrollingInterestIncreaseDecreaseFromDerecognition	0	usd
CY2023Q3	us-gaap	Minority Interest MinorityInterest	15400000	usd
CY2024Q3	us-gaap	Minority Interest MinorityInterest	1600000	usd
	dei	Local Phone Number LocalPhoneNumber	542-3300
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	999400000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	1015900000	usd
	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	382300000	usd
	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	361000000.0	usd
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	127800000	usd
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	132100000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	193700000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8900000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8200000	usd
	us-gaap	Interest Expense InterestExpense	44300000	usd
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2900000	usd
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-15700000	usd
	us-gaap	Dividends Dividends	12000000.0	usd
CY2023Q3	us-gaap	Undistributed Earnings UndistributedEarnings	57500000	usd
CY2023Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	57500000	usd
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.40
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	168275970	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	162233695	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	174261326	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166920744	shares
	us-gaap	Profit Loss ProfitLoss	219400000	usd
	us-gaap	Profit Loss ProfitLoss	264000000.0	usd
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1500000	usd
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	100000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	90400000	usd
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	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	10500000	usd
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	297800000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	173600000	usd
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	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6700000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	295600000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	166900000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#OtherAssets
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#OtherAssets
CY2024Q3	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2023Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-1599372
	dei	Entity Address Address Line1 EntityAddressAddressLine1	Point Building
	dei	Entity Address Address Line2 EntityAddressAddressLine2	3 Waterloo Lane
	dei	Entity Address City Or Town EntityAddressCityOrTown	Pembroke
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	HM 08
	dei	Entity Address Country EntityAddressCountry	BM
	dei	City Area Code CityAreaCode	441
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Shell Company EntityShellCompany	false
CY2024Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0.0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0.0	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	5316300000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	4754600000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	5411800000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	4755400000	usd
CY2024Q3	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	250300000	usd
CY2023Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	568100000	usd
CY2024Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	233100000	usd
CY2023Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	534900000	usd
CY2024Q3	spnt	Other Short Term Investments Cost OtherShortTermInvestmentsCost	52200000	usd
CY2023Q4	spnt	Other Short Term Investments Cost OtherShortTermInvestmentsCost	370800000	usd
CY2024Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	52400000	usd
CY2023Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	371600000	usd
CY2024Q3	spnt	Investments In Related Party Investment Funds InvestmentsInRelatedPartyInvestmentFunds	114500000	usd
CY2023Q4	spnt	Investments In Related Party Investment Funds InvestmentsInRelatedPartyInvestmentFunds	105600000	usd
CY2024Q3	spnt	Other Long Term Investments Cost OtherLongTermInvestmentsCost	329800000	usd
CY2023Q4	spnt	Other Long Term Investments Cost OtherLongTermInvestmentsCost	358100000	usd
CY2024Q3	spnt	Other Long Term Investments Related Parties OtherLongTermInvestmentsRelatedParties	146500000	usd
CY2023Q4	spnt	Other Long Term Investments Related Parties OtherLongTermInvestmentsRelatedParties	173700000	usd
CY2024Q3	us-gaap	Other Long Term Investments OtherLongTermInvestments	236100000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	310100000	usd
CY2024Q3	us-gaap	Investments Investments	6047900000	usd
CY2023Q4	us-gaap	Investments Investments	6077600000	usd
CY2024Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	640700000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	969200000	usd
CY2024Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	174500000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	132100000	usd
CY2024Q3	spnt	Redemption Receivable Related Party Investment Fund RedemptionReceivableRelatedPartyInvestmentFund	0	usd
CY2023Q4	spnt	Redemption Receivable Related Party Investment Fund RedemptionReceivableRelatedPartyInvestmentFund	3000000.0	usd
CY2024Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	13900000	usd
CY2023Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	5600000	usd
CY2024Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	49400000	usd
CY2023Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	42300000	usd
CY2024Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2069100000	usd
CY2023Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1966300000	usd
CY2024Q3	us-gaap	Deferred Policy Acquisition Costs And Value Of Business Acquired DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired	330000000.0	usd
CY2023Q4	us-gaap	Deferred Policy Acquisition Costs And Value Of Business Acquired DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired	308900000	usd
CY2024Q3	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	467200000	usd
CY2023Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	449200000	usd
CY2024Q3	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2198700000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2295100000	usd
CY2024Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	249200000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	293600000	usd
CY2024Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	143800000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	152700000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	298100000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	175900000	usd
CY2024Q3	us-gaap	Assets Assets	12682500000	usd
CY2023Q4	us-gaap	Assets Assets	12871500000	usd
CY2024Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5702100000	usd
CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5608100000	usd
CY2024Q3	us-gaap	Unearned Premiums UnearnedPremiums	1684000000	usd
CY2023Q4	us-gaap	Unearned Premiums UnearnedPremiums	1627300000	usd
CY2024Q3	us-gaap	Reinsurance Payable ReinsurancePayable	1509600000	usd
CY2023Q4	us-gaap	Reinsurance Payable ReinsurancePayable	1736700000	usd
CY2024Q3	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	20200000	usd
CY2023Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	134400000	usd
CY2024Q3	spnt	Liability For Claims And Claims Adjustment Expense Deferred Gain On Retroactive Reinsurance Contracts LiabilityForClaimsAndClaimsAdjustmentExpenseDeferredGainOnRetroactiveReinsuranceContracts	21700000	usd
CY2023Q4	spnt	Liability For Claims And Claims Adjustment Expense Deferred Gain On Retroactive Reinsurance Contracts LiabilityForClaimsAndClaimsAdjustmentExpenseDeferredGainOnRetroactiveReinsuranceContracts	27900000	usd
CY2024Q3	us-gaap	Long Term Debt LongTermDebt	660500000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	786200000	usd
CY2024Q3	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	23100000	usd
CY2023Q4	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	6200000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	38900000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	68700000	usd
CY2024Q3	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	58400000	usd
CY2023Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	67300000	usd
CY2024Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	267500000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	278100000	usd
CY2024Q3	us-gaap	Liabilities Liabilities	9986000000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	10340900000	usd
CY2024Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	161866867	shares
CY2024Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	161866867	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	168120022	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	168120022	shares
CY2024Q3	us-gaap	Common Stock Value CommonStockValue	16200000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2696500000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2530600000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12871500000	usd
CY2024Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	568900000	usd
CY2023Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	613000000.0	usd
	us-gaap	Premiums Earned Net PremiumsEarnedNet	1753200000	usd
	us-gaap	Premiums Earned Net PremiumsEarnedNet	1848200000	usd
CY2024Q3	us-gaap	Net Investment Income NetInvestmentIncome	77700000	usd
CY2023Q3	us-gaap	Net Investment Income NetInvestmentIncome	75100000	usd
	us-gaap	Net Investment Income NetInvestmentIncome	234700000	usd
	us-gaap	Net Investment Income NetInvestmentIncome	205300000	usd
CY2024Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	6900000	usd
CY2023Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7100000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-48000000.0	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	2400000	usd
CY2024Q3	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	7900000	usd
CY2023Q3	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	100000	usd
	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	8900000	usd
	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	0	usd
CY2024Q3	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	92500000	usd
CY2023Q3	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	68100000	usd
	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	195600000	usd
	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	207700000	usd
CY2024Q3	us-gaap	Other Income OtherIncome	18100000	usd
CY2023Q3	us-gaap	Other Income OtherIncome	21800000	usd
	us-gaap	Other Income OtherIncome	164800000	usd
	us-gaap	Other Income OtherIncome	80000000.0	usd
CY2024Q3	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	117300000	usd
CY2023Q3	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	300000	usd
	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	122600000	usd
	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	44400000	usd
CY2024Q3	us-gaap	Revenues Revenues	562200000	usd
CY2023Q3	us-gaap	Revenues Revenues	702600000	usd
	us-gaap	Revenues Revenues	1991000000	usd
	us-gaap	Revenues Revenues	2091500000	usd
CY2024Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	317500000	usd
CY2023Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	373100000	usd
CY2024Q3	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	117500000	usd
CY2023Q3	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	129500000	usd
CY2024Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	44900000	usd
CY2023Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	36600000	usd
CY2024Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	51400000	usd
CY2023Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	63400000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	174000000.0	usd
CY2024Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3000000.0	usd
CY2023Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2900000	usd
CY2024Q3	us-gaap	Interest Expense InterestExpense	13800000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	19800000	usd
	us-gaap	Interest Expense InterestExpense	50000000.0	usd
CY2024Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3000000.0	usd
CY2023Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1800000	usd
CY2024Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	551100000	usd
CY2023Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	623500000	usd
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1745300000	usd
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1770900000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11100000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	79100000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	245700000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	320600000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56600000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	8700000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	63800000	usd
	us-gaap	Profit Loss ProfitLoss	219400000	usd
	us-gaap	Profit Loss ProfitLoss	264000000.0	usd
CY2024Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	usd
CY2023Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2300000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6700000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	8500000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	61500000	usd
CY2024Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	4500000	usd
	us-gaap	Undistributed Earnings UndistributedEarnings	205200000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.03
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.03
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	165659401	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	163738528	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172803298	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	168516508	shares
CY2024Q3	us-gaap	Profit Loss ProfitLoss	8700000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	63800000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	400000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1100000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	112200000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-56200000	usd
CY2024Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	3100000	usd
CY2023Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	2200000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	109500000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-59500000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	118200000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4300000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	200000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2300000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	118000000.0	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2000000.0	usd
	spnt	Change In Fair Value Of Liability Classified Capital Instruments ChangeInFairValueOfLiabilityClassifiedCapitalInstruments	31900000	usd
	spnt	Change In Fair Value Of Liability Classified Capital Instruments ChangeInFairValueOfLiabilityClassifiedCapitalInstruments	44400000	usd
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	38700000	usd
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	125800000	usd
	spnt	Increase Decrease In Liability For Claims And Claims Adjustment Expense Deferred Gain On Retroactive Reinsurance Contracts IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseDeferredGainOnRetroactiveReinsuranceContracts	-6200000	usd
	spnt	Increase Decrease In Liability For Claims And Claims Adjustment Expense Deferred Gain On Retroactive Reinsurance Contracts IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseDeferredGainOnRetroactiveReinsuranceContracts	25800000	usd
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-227100000	usd
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	919800000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-10600000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	6800000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-33000000.0	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	367900000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1893100000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2793300000	usd
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	375700000	usd
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	1150800000	usd
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	25800000	usd
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	7600000	usd
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	1365700000	usd
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	929000000.0	usd
	spnt	Proceeds From Sales And Maturities Of Debt Securities Trading And Short Term Investments ProceedsFromSalesAndMaturitiesOfDebtSecuritiesTradingAndShortTermInvestments	1009300000	usd
	spnt	Proceeds From Sales And Maturities Of Debt Securities Trading And Short Term Investments ProceedsFromSalesAndMaturitiesOfDebtSecuritiesTradingAndShortTermInvestments	2525500000	usd
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	51400000	usd
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	79400000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	517900000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	usd
	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	393900000	usd
	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	129700000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
	spnt	Proceeds From Payments For Deposit Contracts Liabilities ProceedsFromPaymentsForDepositContractsLiabilities	-98200000	usd
	spnt	Proceeds From Payments For Deposit Contracts Liabilities ProceedsFromPaymentsForDepositContractsLiabilities	-7600000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	18500000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	10400000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	12000000.0	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	12000000.0	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7500000	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	9200000	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	0	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-18000000.0	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	815200000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	811200000	usd
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassifications</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain comparative figures have been reclassified to conform to the current year presentation.</span></div>
CY2024Q2	spnt	Reinsurance Loss Portfolio Transfer Loss Reserves Covered ReinsuranceLossPortfolioTransferLossReservesCovered	400000000	usd
CY2024Q2	spnt	Reinsurance Loss Portfolio Transfer Aggregate Limit Percentage Of Booked Reserves ReinsuranceLossPortfolioTransferAggregateLimitPercentageOfBookedReserves	1.50
CY2022Q3	spnt	Reinsurance Loss Portfolio Transfer Loss Reserves Covered ReinsuranceLossPortfolioTransferLossReservesCovered	1300000000	usd
CY2023Q2	spnt	Reinsurance Loss Portfolio Transfer Loss Reserves Covered ReinsuranceLossPortfolioTransferLossReservesCovered	905600000	usd
CY2024Q3	spnt	Liability For Claims And Claims Adjustment Expense Deferred Gain On Retroactive Reinsurance Contracts LiabilityForClaimsAndClaimsAdjustmentExpenseDeferredGainOnRetroactiveReinsuranceContracts	21700000	usd
CY2023Q1	spnt	Reinsurance Loss Portfolio Transfer Aggregate Limit Percentage Of Booked Reserves ReinsuranceLossPortfolioTransferAggregateLimitPercentageOfBookedReserves	1.30
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2024Q3	us-gaap	Premiums Written Gross PremiumsWrittenGross	714000000.0	usd
CY2024Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	504200000	usd
CY2024Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	568900000	usd
CY2024Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	317500000	usd
CY2024Q3	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	117500000	usd
CY2024Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	44900000	usd
CY2024Q3	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	89000000.0	usd
CY2024Q3	spnt	Segment Income Loss SegmentIncomeLoss	89000000.0	usd
CY2024Q3	us-gaap	Net Investment Income NetInvestmentIncome	77700000	usd
CY2024Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	6900000	usd
CY2024Q3	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	7900000	usd
CY2024Q3	us-gaap	Other Income OtherIncome	18100000	usd
CY2024Q3	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	117300000	usd
CY2024Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	51400000	usd
CY2024Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3000000.0	usd
CY2024Q3	us-gaap	Interest Expense InterestExpense	13800000	usd
CY2024Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3000000.0	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11100000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	8700000	usd
CY2024Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	8500000	usd
CY2024Q3	us-gaap	Loss Ratio LossRatio	0.558
CY2024Q3	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.207
CY2024Q3	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.079
CY2024Q3	us-gaap	Combined Ratio CombinedRatio	0.844
CY2023Q3	us-gaap	Premiums Written Gross PremiumsWrittenGross	758800000	usd
CY2023Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	566000000.0	usd
CY2023Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	613000000.0	usd
CY2023Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	373100000	usd
CY2023Q3	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	129500000	usd
CY2023Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	36600000	usd
CY2023Q3	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	73800000	usd
CY2023Q3	spnt	Segment Income Loss SegmentIncomeLoss	73800000	usd
CY2023Q3	us-gaap	Net Investment Income NetInvestmentIncome	75100000	usd
CY2023Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7100000	usd
CY2023Q3	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	100000	usd
CY2023Q3	us-gaap	Other Income OtherIncome	21800000	usd
CY2023Q3	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	300000	usd
CY2023Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	63400000	usd
CY2023Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2900000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	19800000	usd
CY2023Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1800000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	79100000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15300000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	63800000	usd
CY2023Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2300000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	61500000	usd
CY2023Q3	us-gaap	Loss Ratio LossRatio	0.609
CY2023Q3	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.211
CY2023Q3	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.060
CY2023Q3	us-gaap	Combined Ratio CombinedRatio	0.880
	us-gaap	Premiums Written Gross PremiumsWrittenGross	2485100000	usd
	us-gaap	Premiums Written Net PremiumsWrittenNet	1787100000	usd
	us-gaap	Premiums Earned Net PremiumsEarnedNet	1753200000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	999400000	usd
	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	382300000	usd
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	127800000	usd
	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	243700000	usd
	spnt	Segment Income Loss SegmentIncomeLoss	243700000	usd
	us-gaap	Net Investment Income NetInvestmentIncome	234700000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-48000000.0	usd
	spnt	Gain Loss On Investments Related Party GainLossOnInvestmentsRelatedParty	8900000	usd
	us-gaap	Other Income OtherIncome	164800000	usd
	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	122600000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	174000000.0	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8900000	usd
	us-gaap	Interest Expense InterestExpense	50000000.0	usd
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2900000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	245700000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26300000	usd
	us-gaap	Profit Loss ProfitLoss	219400000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2200000	usd
	us-gaap	Net Income Loss NetIncomeLoss	217200000	usd
	us-gaap	Loss Ratio LossRatio	0.570
	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.218
	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.073
	us-gaap	Combined Ratio CombinedRatio	0.861
	us-gaap	Premiums Written Gross PremiumsWrittenGross	2711800000	usd
	us-gaap	Premiums Written Net PremiumsWrittenNet	1983300000	usd
	us-gaap	Premiums Earned Net PremiumsEarnedNet	1848200000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	1015900000	usd
	us-gaap	Deferred Policy Acquisition Costs And Present Value Of Future Profits Amortization1 DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1	361000000.0	usd
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	132100000	usd
	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	339200000	usd
	spnt	Segment Income Loss SegmentIncomeLoss	339200000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	2400000	usd
	us-gaap	Other Income OtherIncome	80000000.0	usd
	spnt	Loss On Settlement And Change In Fair Value Of Liability Classified Capital Instruments LossOnSettlementAndChangeInFairValueOfLiabilityClassifiedCapitalInstruments	44400000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	193700000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8200000	usd
	us-gaap	Interest Expense InterestExpense	44300000	usd
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-15700000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	320600000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6700000	usd
CY2024Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	640700000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	969200000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	815200000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1101300000	usd
CY2024Q3	us-gaap	Restricted Investments RestrictedInvestments	2307400000	usd
CY2023Q4	us-gaap	Restricted Investments RestrictedInvestments	2668000000	usd
CY2024Q3	spnt	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalents And Restricted Investments CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsAndRestrictedInvestments	3122600000	usd
CY2023Q4	spnt	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalents And Restricted Investments CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsAndRestrictedInvestments	3769300000	usd
CY2024Q3	spnt	Cost And Equity Method Investments CostAndEquityMethodInvestments	72000000.0	usd
CY2024Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	6049400000	usd
CY2024Q3	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	58400000	usd
CY2024Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	9800000	usd
CY2024Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	68200000	usd
CY2023Q4	spnt	Cost And Equity Method Investments CostAndEquityMethodInvestments	80100000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	6093300000	usd
CY2023Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	67300000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	6400000	usd
CY2023Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	73700000	usd
CY2024Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	126900000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	1100000	usd
CY2024Q3	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements	0	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-9000000.0	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	119000000.0	usd
CY2024Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	91300000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	0	usd
CY2024Q3	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements	-131500000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-108400000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	68200000	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	185400000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	1100000	usd
	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements	5000000.0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-62500000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	119000000.0	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	73700000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	0	usd
	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements	-132600000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-127100000	usd
CY2024Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	68200000	usd
CY2023Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	239100000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	-25300000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	4100000	usd
CY2023Q3	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements	19600000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-11100000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	187200000	usd
CY2023Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	92000000.0	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	14300000	usd
CY2023Q3	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements	-15400000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-6600000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	97500000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	240000000.0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	-25300000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	9400000	usd
	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements	30700000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-6200000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	187200000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	30000000.0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	8500000	usd
	spnt	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales And Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements	-16900000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-75900000	usd
CY2023Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	97500000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	5316300000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	108200000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	11400000	usd
CY2024Q3	spnt	Debt Securities Available For Sale Accumulated Net Foreign Currency Gains Losses DebtSecuritiesAvailableForSaleAccumulatedNetForeignCurrencyGainsLosses	-1300000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	5411800000	usd
CY2024Q3	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	250300000	usd
CY2024Q3	spnt	Debt Securities Trading Accumulated Unrecognized Gain DebtSecuritiesTradingAccumulatedUnrecognizedGain	1000000.0	usd
CY2024Q3	spnt	Debt Securities Trading Accumulated Unrecognized Loss DebtSecuritiesTradingAccumulatedUnrecognizedLoss	18200000	usd
CY2024Q3	spnt	Debt Securities Trading Accumulated Net Foreign Currency Gains Losses DebtSecuritiesTradingAccumulatedNetForeignCurrencyGainsLosses	0	usd
CY2024Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	233100000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	4754600000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	42900000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	41200000	usd
CY2023Q4	spnt	Debt Securities Available For Sale Accumulated Net Foreign Currency Gains Losses DebtSecuritiesAvailableForSaleAccumulatedNetForeignCurrencyGainsLosses	-900000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	4755400000	usd
CY2023Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	568100000	usd
CY2023Q4	spnt	Debt Securities Trading Accumulated Unrecognized Gain DebtSecuritiesTradingAccumulatedUnrecognizedGain	700000	usd
CY2023Q4	spnt	Debt Securities Trading Accumulated Unrecognized Loss DebtSecuritiesTradingAccumulatedUnrecognizedLoss	33900000	usd
CY2023Q4	spnt	Debt Securities Trading Accumulated Net Foreign Currency Gains Losses DebtSecuritiesTradingAccumulatedNetForeignCurrencyGainsLosses	0	usd
CY2023Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	534900000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	560	security
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	718	security
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	330100000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3000000.0	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	432100000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	8400000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	762200000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	11400000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1676200000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	25900000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	592000000.0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	15300000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2268200000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	41200000	usd
	spnt	Debt Securities Net Of Securities Sold Not Yet Purchased Weighted Average Duration DebtSecuritiesNetOfSecuritiesSoldNotYetPurchasedWeightedAverageDuration	P3Y
CY2023	spnt	Debt Securities Net Of Securities Sold Not Yet Purchased Weighted Average Duration DebtSecuritiesNetOfSecuritiesSoldNotYetPurchasedWeightedAverageDuration	P2Y9M18D
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	257400000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	257500000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling Within One Year Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearAmortizedCost	3900000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling Within One Year Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearFairValue	3800000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	358600000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	357200000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling Within One Year Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearAmortizedCost	80200000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling Within One Year Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearFairValue	79700000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	1988300000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	2018800000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After One Through Five Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost	6900000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After One Through Five Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue	6600000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	2221000000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	2219800000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After One Through Five Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost	37200000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After One Through Five Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue	34500000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	574800000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	595200000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Five Through Ten Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsAmortizedCost	400000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Five Through Ten Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsFairValue	400000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	183300000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	188500000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Five Through Ten Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsAmortizedCost	19400000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Five Through Ten Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsFairValue	18000000.0	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	67700000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	69700000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Ten Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterTenYearsAmortizedCost	11200000	usd
CY2024Q3	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Ten Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterTenYearsFairValue	7400000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	2500000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	2300000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Ten Years Amortized Cost DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterTenYearsAmortizedCost	26600000	usd
CY2023Q4	spnt	Debt Securities Trading Maturity Allocated And Single Maturity Date Rolling After Ten Years Fair Value DebtSecuritiesTradingMaturityAllocatedAndSingleMaturityDateRollingAfterTenYearsFairValue	21300000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	5316300000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	5411800000	usd
CY2024Q3	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	250300000	usd
CY2024Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	233100000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	4754600000	usd
CY2023Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	568100000	usd
CY2023Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	534900000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	5411800000	usd
CY2024Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	233100000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	4755400000	usd
CY2023Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	534900000	usd
CY2024Q3	spnt	Other Long Term Investments Cost OtherLongTermInvestmentsCost	329800000	usd
CY2024Q3	spnt	Other Long Term Investments Accumulated Unrecognized Gain OtherLongTermInvestmentsAccumulatedUnrecognizedGain	17800000	usd
CY2024Q3	spnt	Other Long Term Investments Accumulated Unrecognized Loss OtherLongTermInvestmentsAccumulatedUnrecognizedLoss	114400000	usd
CY2024Q3	spnt	Other Long Term Investments Accumulated Net Foreign Currency Gains Losses OtherLongTermInvestmentsAccumulatedNetForeignCurrencyGainsLosses	2900000	usd
CY2024Q3	us-gaap	Other Long Term Investments OtherLongTermInvestments	236100000	usd
CY2023Q4	spnt	Other Long Term Investments Cost OtherLongTermInvestmentsCost	358100000	usd
CY2023Q4	spnt	Other Long Term Investments Accumulated Unrecognized Gain OtherLongTermInvestmentsAccumulatedUnrecognizedGain	20000000.0	usd
CY2023Q4	spnt	Other Long Term Investments Accumulated Unrecognized Loss OtherLongTermInvestmentsAccumulatedUnrecognizedLoss	70600000	usd
CY2023Q4	spnt	Other Long Term Investments Accumulated Net Foreign Currency Gains Losses OtherLongTermInvestmentsAccumulatedNetForeignCurrencyGainsLosses	2600000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	310100000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	310100000	usd
CY2024Q3	us-gaap	Other Long Term Investments OtherLongTermInvestments	236100000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	310100000	usd
CY2024Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	7400000	usd
CY2023Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	4000000.0	usd
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	18900000	usd
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	14500000	usd
CY2024Q3	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	92500000	usd
CY2023Q3	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	68100000	usd
	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	195600000	usd
	spnt	Net Investment Income Loss And Gain Loss On Investments NetInvestmentIncomeLossAndGainLossOnInvestments	207700000	usd
CY2024Q3	spnt	Realized Investment Gains RealizedInvestmentGains	17600000	usd
CY2023Q3	spnt	Realized Investment Gains RealizedInvestmentGains	16500000	usd
	spnt	Realized Investment Gains RealizedInvestmentGains	27000000.0	usd
	spnt	Realized Investment Gains RealizedInvestmentGains	41400000	usd
CY2024Q3	spnt	Realized Investment Losses RealizedInvestmentLosses	10000000.0	usd
CY2023Q3	spnt	Realized Investment Losses RealizedInvestmentLosses	12400000	usd
	spnt	Realized Investment Losses RealizedInvestmentLosses	42700000	usd
	spnt	Realized Investment Losses RealizedInvestmentLosses	73700000	usd
CY2024Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	7600000	usd
CY2023Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	4100000	usd
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-15700000	usd
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-32300000	usd
CY2024Q3	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-700000	usd
CY2023Q3	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-11200000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-32300000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	34700000	usd
CY2024Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	6900000	usd
CY2023Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7100000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-48000000.0	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	2400000	usd
CY2024Q3	spnt	Related Party Transaction Gain Loss On Investments RelatedPartyTransactionGainLossOnInvestments	200000	usd
	spnt	Related Party Transaction Gain Loss On Investments RelatedPartyTransactionGainLossOnInvestments	-32800000	usd
CY2023Q3	spnt	Related Party Transaction Gain Loss On Investments RelatedPartyTransactionGainLossOnInvestments	-7300000	usd
	spnt	Related Party Transaction Gain Loss On Investments RelatedPartyTransactionGainLossOnInvestments	-10000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-3000000.0	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-2200000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-10400000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-600000	usd
CY2024Q3	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	-700000	usd
CY2023Q3	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	-1100000	usd
	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	-7800000	usd
	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	-41000000.0	usd
CY2024Q3	spnt	Gain Loss On Sale Of Other Short Term Investments GainLossOnSaleOfOtherShortTermInvestments	0	usd
CY2023Q3	spnt	Gain Loss On Sale Of Other Short Term Investments GainLossOnSaleOfOtherShortTermInvestments	0	usd
	spnt	Gain Loss On Sale Of Other Short Term Investments GainLossOnSaleOfOtherShortTermInvestments	700000	usd
	spnt	Gain Loss On Sale Of Other Short Term Investments GainLossOnSaleOfOtherShortTermInvestments	-1400000	usd
CY2024Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4900000	usd
CY2023Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	0	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4900000	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	0	usd
CY2024Q3	spnt	Gain Loss On Sale Of Other Long Term Investments GainLossOnSaleOfOtherLongTermInvestments	5200000	usd
CY2023Q3	spnt	Gain Loss On Sale Of Other Long Term Investments GainLossOnSaleOfOtherLongTermInvestments	9600000	usd
	spnt	Gain Loss On Sale Of Other Long Term Investments GainLossOnSaleOfOtherLongTermInvestments	-4900000	usd
CY2024Q3	spnt	Cash And Cash Equivalents Realized Gain Loss CashAndCashEquivalentsRealizedGainLoss	1200000	usd
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-32300000	usd
CY2024Q3	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	6000000.0	usd
CY2023Q3	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	200000	usd
CY2024Q3	spnt	Other Short Term Investments Unrealized Gain Loss OtherShortTermInvestmentsUnrealizedGainLoss	300000	usd
CY2024Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1200000	usd
CY2023Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	800000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	200000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	4300000	usd
CY2024Q3	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-6500000	usd
	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-45800000	usd
	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-23800000	usd
CY2024Q3	spnt	Cash And Cash Equivalents Unrealized Gain Loss CashAndCashEquivalentsUnrealizedGainLoss	700000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	34700000	usd
	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-45800000	usd
	spnt	Other Long Term Investments Unrealized Gain Loss OtherLongTermInvestmentsUnrealizedGainLoss	-23800000	usd
CY2024Q2	us-gaap	Minority Interest MinorityInterest	1400000	usd
CY2023Q2	us-gaap	Minority Interest MinorityInterest	12900000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	16700000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	7900000	usd
CY2024Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	usd
CY2023Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2300000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2200000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6700000	usd
CY2024Q3	spnt	Noncontrolling Interest Increase Decrease From Contributions Redemptions NoncontrollingInterestIncreaseDecreaseFromContributionsRedemptions	0	usd
CY2023Q3	spnt	Noncontrolling Interest Increase Decrease From Contributions Redemptions NoncontrollingInterestIncreaseDecreaseFromContributionsRedemptions	200000	usd
	spnt	Noncontrolling Interest Increase Decrease From Contributions Redemptions NoncontrollingInterestIncreaseDecreaseFromContributionsRedemptions	200000	usd
	spnt	Noncontrolling Interest Increase Decrease From Contributions Redemptions NoncontrollingInterestIncreaseDecreaseFromContributionsRedemptions	800000	usd
CY2024Q3	spnt	Noncontrolling Interest Increase Decrease From Derecognition NoncontrollingInterestIncreaseDecreaseFromDerecognition	0	usd
CY2023Q3	spnt	Noncontrolling Interest Increase Decrease From Derecognition NoncontrollingInterestIncreaseDecreaseFromDerecognition	0	usd
	spnt	Noncontrolling Interest Increase Decrease From Derecognition NoncontrollingInterestIncreaseDecreaseFromDerecognition	-17500000	usd
CY2024Q3	us-gaap	Minority Interest MinorityInterest	1600000	usd
CY2023Q3	us-gaap	Minority Interest MinorityInterest	15400000	usd
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table represents the activity in the loss and loss adjustment expense reserves for the nine months ended September 30, 2024 and 2023:</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:73.453%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.251%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.544%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.252%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2024</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2023</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Gross reserves for loss and loss adjustment expenses, beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,608.1 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,268.7 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less: loss and loss adjustment expenses recoverable, beginning of period</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(2,295.1)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(1,376.2)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less: deferred gains (charges) on retroactive reinsurance contracts</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">27.5 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(1.0)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net reserves for loss and loss adjustment expenses, beginning of period</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,340.5 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,891.5 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net reserves for loss and loss adjustment expenses transferred </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:400;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(1)</span></div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">— </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(860.6)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Increase (decrease) in net loss and loss adjustment expenses incurred in respect of losses occurring in:</span></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></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Current year</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,070.0 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,179.0 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Prior years</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(70.6)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(163.1)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total incurred loss and loss adjustment expenses</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">999.4 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,015.9 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net loss and loss adjustment expenses paid in respect of losses occurring in:</span></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></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Current year</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(159.0)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(161.7)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Prior years</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(659.5)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(709.7)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total net paid losses</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(818.5)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(871.4)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Foreign currency translation</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3.6 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(15.6)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></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></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net reserves for loss and loss adjustment expenses, end of period</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,525.0 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,159.8 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Plus: loss and loss adjustment expenses recoverable, end of period</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">2,198.7 </span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">2,314.2 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Plus: deferred (gains) charges on retroactive reinsurance </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:400;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(2)</span></div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(21.6)</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(25.2)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Gross reserves for loss and loss adjustment expenses, end of period</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,702.1 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,448.8 </span></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></tr></table></div><div style="margin-top:1pt;padding-left:13.5pt;text-align:justify;text-indent:-13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(1)</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%;padding-left:4.18pt">Net reserves for loss and loss adjustment expenses transferred represents the transfer of reserves under the 2023 LPT</span></div><div style="margin-top:1pt;padding-left:13.5pt;text-align:justify;text-indent:-13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(2)</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%;padding-left:4.18pt">Deferred charges on retroactive reinsurance are recorded in Other assets on the Company’s consolidated balance sheets. Deferred gains on retroactive reinsurance are presented as a separate line item on the Company’s consolidated balance sheets.</span></div>
CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5608100000	usd
CY2022Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5268700000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2295100000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	1376200000	usd
CY2023Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	27500000	usd
CY2022Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	-1000000.0	usd
CY2023Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	3340500000	usd
CY2022Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	3891500000	usd
CY2024Q3	spnt	Liability For Unpaid Claims And Claims Adjustment Expense Transferred LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTransferred	0	usd
CY2023Q3	spnt	Liability For Unpaid Claims And Claims Adjustment Expense Transferred LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTransferred	860600000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	1070000000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	1179000000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-70600000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-163100000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	999400000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	1015900000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	159000000.0	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	161700000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	659500000	usd
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	709700000	usd
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	818500000	usd
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	871400000	usd
	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	15600000	usd
CY2024Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	3525000000	usd
CY2023Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	3159800000	usd
CY2024Q3	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2198700000	usd
CY2023Q3	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2314200000	usd
CY2024Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	21600000	usd
CY2023Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	25200000	usd
CY2024Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5702100000	usd
CY2023Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5448800000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-70600000	usd
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-163100000	usd
	spnt	Prior Year Claims And Claims Adjustment Expense Loss Portfolio Transfers PriorYearClaimsAndClaimsAdjustmentExpenseLossPortfolioTransfers	-122200000	usd
CY2024Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2069100000	usd
CY2023Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1966300000	usd
CY2024Q3	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2198700000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2295100000	usd
CY2024Q3	spnt	Other Assets Within Scope Of Credit Losses OtherAssetsWithinScopeOfCreditLosses	104200000	usd
CY2023Q4	spnt	Other Assets Within Scope Of Credit Losses OtherAssetsWithinScopeOfCreditLosses	76800000	usd
CY2024Q3	spnt	Assets Within Scope Of Credit Losses AssetsWithinScopeOfCreditLosses	4372000000	usd
CY2023Q4	spnt	Assets Within Scope Of Credit Losses AssetsWithinScopeOfCreditLosses	4338200000	usd
CY2024Q3	spnt	Assets Within Scope Of Credit Losses Allowance For Credit Loss AssetsWithinScopeOfCreditLossesAllowanceForCreditLoss	28400000	usd
CY2023Q4	spnt	Assets Within Scope Of Credit Losses Allowance For Credit Loss AssetsWithinScopeOfCreditLossesAllowanceForCreditLoss	28800000	usd
CY2024Q3	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	usd
	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	400000	usd
CY2023Q3	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	usd
	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	usd
CY2024Q3	us-gaap	Long Term Debt LongTermDebt	660500000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	786200000	usd
CY2024Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	12400000	usd
	us-gaap	Interest Expense Debt InterestExpenseDebt	36200000	usd
CY2023Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	11300000	usd
	us-gaap	Interest Expense Debt InterestExpenseDebt	33300000	usd
CY2024Q3	us-gaap	Interest Expense Other InterestExpenseOther	5900000	usd
	us-gaap	Interest Expense Other InterestExpenseOther	20100000	usd
CY2023Q3	us-gaap	Interest Expense Other InterestExpenseOther	8500000	usd
	us-gaap	Interest Expense Other InterestExpenseOther	8500000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26300000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56600000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11100000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	245700000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	79100000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	320600000	usd
CY2024Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.216
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.107
CY2024Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2300000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1600000	usd
CY2024Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2024Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	usd
CY2024Q3	spnt	Share Repurchase Program Authorized Additional Amount ShareRepurchaseProgramAuthorizedAdditionalAmount	250000000	usd
CY2024Q3	srt	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	306300000	usd
CY2024Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	181300000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	165659401	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	163738528	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	168275970	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	162233695	shares
CY2024Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	4478382	shares
CY2023Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	1026591	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	2954436	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	1045214	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172803298	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	168516508	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	174261326	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166920744	shares
CY2024Q3	us-gaap	Undistributed Earnings UndistributedEarnings	4500000	usd
CY2023Q3	us-gaap	Undistributed Earnings UndistributedEarnings	57500000	usd
	us-gaap	Undistributed Earnings UndistributedEarnings	205200000	usd
	us-gaap	Undistributed Earnings UndistributedEarnings	245300000	usd
CY2024Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	100000	usd
CY2023Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	4000000.0	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	11200000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	17800000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4400000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	53500000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	194000000.0	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	227500000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.03
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.40
CY2024Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	4500000	usd
CY2023Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	57500000	usd
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	205200000	usd
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	245300000	usd
CY2024Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	100000	usd
CY2023Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	4000000.0	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	11200000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	17800000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4400000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	53500000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	194000000.0	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	227500000	usd
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.03
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2024Q3	spnt	Related Party Transaction Expenses Income From Transactions With Related Party RelatedPartyTransactionExpensesIncomeFromTransactionsWithRelatedParty	200000	usd
CY2023Q3	spnt	Related Party Transaction Expenses Income From Transactions With Related Party RelatedPartyTransactionExpensesIncomeFromTransactionsWithRelatedParty	2200000	usd
	spnt	Related Party Transaction Expenses Income From Transactions With Related Party RelatedPartyTransactionExpensesIncomeFromTransactionsWithRelatedParty	4200000	usd
	spnt	Related Party Transaction Expenses Income From Transactions With Related Party RelatedPartyTransactionExpensesIncomeFromTransactionsWithRelatedParty	6400000	usd
	spnt	Class Of Warrant Or Right Exercised During Period ClassOfWarrantOrRightExercisedDuringPeriod	5418434	shares
CY2024Q3	us-gaap	Lease Cost LeaseCost	2100000	usd
	us-gaap	Lease Cost LeaseCost	6800000	usd
CY2023Q3	us-gaap	Lease Cost LeaseCost	2600000	usd
	us-gaap	Lease Cost LeaseCost	7700000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	22000000.0	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	25600000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	24900000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	28400000	usd
CY2024Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y1M6D
CY2024Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.030
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.029
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	1700000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5900000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5100000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4200000	usd
CY2024Q3	spnt	Lessee Operating Lease Liability To Be Paid Due After Year Three LesseeOperatingLeaseLiabilityToBePaidDueAfterYearThree	9300000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	26200000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1300000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	24900000	usd
CY2024Q3	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q3	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
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CY2024Q3	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
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0001576018-24-000054-index.html	Edgar Link	pending
0001576018-24-000054.txt	Edgar Link	pending
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exhibit31193024.htm	Edgar Link	pending
exhibit31293024.htm	Edgar Link	pending
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$SPNT
SiriusPoint Ltd Stock $spnt

2024 Q4 Form 10-Q Financial Statement

#000157601824000054 Filed on October 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SPNT SiriusPoint Ltd Stock $spnt

2024 Q4 Form 10-Q Financial Statement

#000157601824000054 Filed on October 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SPNT
SiriusPoint Ltd Stock $spnt