$WRB
BERKLEY W R CORP Stock $wrb

$wrb Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000001154424000005 Filed on February 23, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$3.257B	$3.221B	$12.14B
YoY Change	12.5%	6.89%	8.74%
Cost Of Revenue	$1.664B		$6.372B
YoY Change	8.12%		8.71%
Gross Profit	$1.593B		$5.771B
YoY Change	17.46%		8.79%
Gross Profit Margin	48.91%		47.52%
Selling, General & Admin	$32.52M	$1.951B	$2.052B
YoY Change	-8.06%	16.83%	15.6%
% of Gross Profit	2.04%		35.55%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization			$51.00M
YoY Change			-1.92%
% of Gross Profit			0.88%
Operating Expenses	$2.651B	$2.688B	$10.26B
YoY Change	6.59%	7.38%	10.14%
Operating Profit	-$1.058B		-$4.490B
YoY Change	-6.44%		11.93%
Interest Expense	-$31.73M	-$31.88M	-$127.5M
YoY Change	-0.34%	-0.07%	-2.24%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$574.1M	$501.2M	$1.754B
YoY Change	52.65%	4.76%	2.02%
Income Tax	$132.0M	$102.2M	$370.6M
% Of Pretax Income	23.0%	20.4%	21.12%
Net Earnings	$442.5M	$397.3M	$1.381B
YoY Change	50.44%	3.96%	0.02%
Net Earnings / Revenue	13.59%	12.33%	11.38%
Basic Earnings Per Share	$1.65		$5.10
Diluted Earnings Per Share	$1.64	$1.47	$5.05
COMMON SHARES
Basic Shares Outstanding	256.5M shares	257.9M shares	271.0K shares
Diluted Shares Outstanding	270.5M shares		273.3K shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.169B	$1.363B	$1.363B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$141.3M	$303.6M	$303.6M
YoY Change	-75.81%	29.83%	29.83%
LONG-TERM ASSETS
Property, Plant & Equipment	$466.9M	$426.8M	$603.3M
YoY Change	10.87%	0.84%	1.82%
Goodwill	$174.6M	$174.6M
YoY Change	-5.88%	-5.88%
Intangibles
YoY Change
Long-Term Investments	$1.556B	$1.622B	$24.03B
YoY Change	-2.86%	0.81%	11.67%
Other Assets	$120.8M	$309.6M	$309.6M
YoY Change	-41.18%	-9.11%	-9.11%
Total Long-Term Assets	$37.71B	$36.90B	$36.90B
YoY Change	11.86%	9.73%	9.73%
TOTAL ASSETS
Total Short-Term Assets	$141.3M	$303.6M	$303.6M
Total Long-Term Assets	$37.71B	$36.90B	$36.90B
Total Assets	$37.85B	$37.20B	$37.20B
YoY Change	10.37%	9.87%	9.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$233.1M		$218.6M
YoY Change			7.12%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$233.1M	$47.53M	$266.1M
YoY Change		38.36%	11.62%
LONG-TERM LIABILITIES
Long-Term Debt	$2.837B	$2.837B	$2.837B
YoY Change	0.03%	-0.01%	-0.01%
Other Long-Term Liabilities	$1.202B	$1.512B	$1.294B
YoY Change	5.73%	9.77%	10.24%
Total Long-Term Liabilities	$4.039B	$4.349B	$4.131B
YoY Change	1.66%	3.19%	2.99%
TOTAL LIABILITIES
Total Short-Term Liabilities	$233.1M	$47.53M	$266.1M
Total Long-Term Liabilities	$4.039B	$4.349B	$4.131B
Total Liabilities	$30.05B	$29.73B	$29.75B
YoY Change	9.96%	9.74%	9.71%
SHAREHOLDERS EQUITY
Retained Earnings	$11.46B	$11.04B
YoY Change	11.25%	8.66%
Common Stock	$1.136B	$1.123B
YoY Change	2.01%	1.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.783B	$3.783B
YoY Change	11.68%	16.35%
Treasury Stock Shares
Shareholders Equity	$7.785B	$7.455B	$7.455B
YoY Change
Total Liabilities & Shareholders Equity	$37.85B	$37.20B	$37.20B
YoY Change	10.37%	9.87%	9.87%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$442.5M	$397.3M	$1.381B
YoY Change	50.44%	3.96%	0.02%
Depreciation, Depletion And Amortization			$51.00M
YoY Change			-1.92%
Cash From Operating Activities	$746.2M	$698.1M	$2.929B
YoY Change	67.57%	-12.22%	14.04%
INVESTING ACTIVITIES
Capital Expenditures	$85.03M	-$2.131M	$55.15M
YoY Change	637.36%	-104.77%	-44.07%
Acquisitions			$11.56M
YoY Change			-76.68%
Other Investing Activities	$0.00	-$567.6M	-$1.907B
YoY Change	-100.0%	91.56%	6.36%
Cash From Investing Activities	-$905.1M	-$565.4M	-$1.962B
YoY Change	151.82%	65.84%	3.73%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net			$974.0K
YoY Change			-70.57%
Cash From Financing Activities	-$29.71M	-423.6M	-$1.062B
YoY Change	-89.96%	208.9%	37.63%
NET CHANGE
Cash From Operating Activities	$746.2M	698.1M	$2.929B
Cash From Investing Activities	-$905.1M	-565.4M	-$1.962B
Cash From Financing Activities	-$29.71M	-423.6M	-$1.062B
Net Change In Cash	-$194.1M	-291.0M	-$86.15M
YoY Change	-6.21%	-191.73%	-27.91%
FREE CASH FLOW
Cash From Operating Activities	$746.2M	$698.1M	$2.929B
Capital Expenditures	$85.03M	-$2.131M	$55.15M
Free Cash Flow	$661.2M	$700.2M	$2.874B
YoY Change	52.42%	-6.72%	16.36%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-756836000	usd
CY2023	us-gaap	Premiums Earned Net PremiumsEarnedNet	10400687000	usd
CY2022	us-gaap	Premiums Earned Net PremiumsEarnedNet	9561429000	usd
CY2021	us-gaap	Premiums Earned Net PremiumsEarnedNet	8106031000	usd
CY2023	us-gaap	Net Investment Income NetInvestmentIncome	1052835000	usd
CY2023	dei	Auditor Name AuditorName	KPMG LLP
CY2023	dei	Auditor Location AuditorLocation	New York, New York
CY2023	us-gaap	Premiums Written Net PremiumsWrittenNet	10954467000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000011544
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2022Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	1-15202
CY2023	dei	Entity Registrant Name EntityRegistrantName	W. R. BERKLEY CORP
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1867895
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	475 Steamboat Road
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Greenwich,
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	CT
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	06830
CY2023	dei	City Area Code CityAreaCode	203
CY2023	dei	Local Phone Number LocalPhoneNumber	629-3000
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $.20 per share
CY2023	dei	Trading Symbol TradingSymbol	WRB
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	12125876386	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	256548669	shares
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CY2022	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-442641000	usd
CY2022	us-gaap	Net Investment Income NetInvestmentIncome	779185000	usd
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CY2023	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	47540000	usd
CY2022	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	217311000	usd
CY2021	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	106958000	usd
CY2023	wrb	Investments Allowancefor Credit Loss Period Increase Decrease InvestmentsAllowanceforCreditLossPeriodIncreaseDecrease	-498000	usd
CY2022	wrb	Investments Allowancefor Credit Loss Period Increase Decrease InvestmentsAllowanceforCreditLossPeriodIncreaseDecrease	-14914000	usd
CY2021	wrb	Investments Allowancefor Credit Loss Period Increase Decrease InvestmentsAllowanceforCreditLossPeriodIncreaseDecrease	-16326000	usd
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CY2021	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	93857000	usd
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CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1754403000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1719681000	usd
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CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	370557000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	334727000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251890000	usd
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CY2023Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	303614000	usd
CY2022Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	233863000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	426803000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	423232000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	174597000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	185509000	usd
CY2023Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	213408000	usd
CY2022Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	166784000	usd
CY2023Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1318000	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	39123000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	309623000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	340647000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	865556000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	736022000	usd
CY2023Q4	us-gaap	Assets Assets	37202015000	usd
CY2022Q4	us-gaap	Assets Assets	33861099000	usd
CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	18739652000	usd
CY2022Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	17011223000	usd
CY2023Q4	us-gaap	Unearned Premiums UnearnedPremiums	5922326000	usd
CY2022Q4	us-gaap	Unearned Premiums UnearnedPremiums	5297654000	usd
CY2023Q4	us-gaap	Reinsurance Payable ReinsurancePayable	631164000	usd
CY2022Q4	us-gaap	Reinsurance Payable ReinsurancePayable	523131000	usd
CY2023Q4	us-gaap	Trading Liabilities TradingLiabilities	9357000	usd
CY2022Q4	us-gaap	Trading Liabilities TradingLiabilities	0	usd
CY2023Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	47525000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	34350000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	42660000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	11646000	usd
CY2023Q4	wrb	Senior Notes And Other Debt SeniorNotesAndOtherDebt	1827951000	usd
CY2022Q4	wrb	Senior Notes And Other Debt SeniorNotesAndOtherDebt	1828823000	usd
CY2023Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	1009090000	usd
CY2022Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	1008371000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	1503053000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	1377740000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	29732778000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	27092938000	usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.20
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.20
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1250000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	256544757	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	256544757	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	264546100	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	264546100	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	105803000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	105803000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1017691000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	997534000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11040908000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10161005000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-925838000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1264581000	usd
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	272469871	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	264468528	shares
CY2023Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3783133000	usd
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3251429000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	7455431000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	6748332000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	13806000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	19829000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7469237000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6768161000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	37202015000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	33861099000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.93
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.89
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.34
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1381359000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1381062000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	1022490000	usd
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	47042000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	202397000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	90632000	usd
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	-20861000	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	55872000	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	129682000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2487000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3892000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8525000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	16743000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	145099000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	220015000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	51000000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	49411000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	46680000	usd
CY2023	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	54213000	usd
CY2022	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	53291000	usd
CY2021	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	268649000	usd
CY2023	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	334178000	usd
CY2022	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	268171000	usd
CY2021	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	364395000	usd
CY2023	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	306017000	usd
CY2022	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	266307000	usd
CY2021	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	433644000	usd
CY2023	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	99387000	usd
CY2022	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	88844000	usd
CY2021	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	121663000	usd
CY2023	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	52451000	usd
CY2022	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-3534000	usd
CY2021	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-43890000	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	26691000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	64712000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-7630000	usd
CY2023	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1715076000	usd
CY2022	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1684254000	usd
CY2021	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1635774000	usd
CY2023	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	617535000	usd
CY2022	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	466590000	usd
CY2021	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	786627000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	14462000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	19878000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	89467000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2929238000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2568604000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2183987000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1011195000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	797948000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1842139000	usd
CY2023	wrb	Proceeds From Sale Of Equity Securities Available For Sale ProceedsFromSaleOfEquitySecuritiesAvailableForSale	318852000	usd
CY2022	wrb	Proceeds From Sale Of Equity Securities Available For Sale ProceedsFromSaleOfEquitySecuritiesAvailableForSale	82319000	usd
CY2021	wrb	Proceeds From Sale Of Equity Securities Available For Sale ProceedsFromSaleOfEquitySecuritiesAvailableForSale	126980000	usd
CY2023	wrb	Proceeds From Payments To Equity Method Investments ProceedsFromPaymentsToEquityMethodInvestments	-19904000	usd
CY2022	wrb	Proceeds From Payments To Equity Method Investments ProceedsFromPaymentsToEquityMethodInvestments	24623000	usd
CY2021	wrb	Proceeds From Payments To Equity Method Investments ProceedsFromPaymentsToEquityMethodInvestments	101050000	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3506903000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	4891179000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	6067230000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	6664763000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	8036680000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	10716748000	usd
CY2023	wrb	Payments To Acquire Equity Securities Available For Sale PaymentsToAcquireEquitySecuritiesAvailableForSale	80454000	usd
CY2022	wrb	Payments To Acquire Equity Securities Available For Sale PaymentsToAcquireEquitySecuritiesAvailableForSale	340482000	usd
CY2021	wrb	Payments To Acquire Equity Securities Available For Sale PaymentsToAcquireEquitySecuritiesAvailableForSale	464645000	usd
CY2023	wrb	Payments For Proceeds From Real Estate PaymentsForProceedsFromRealEstate	2074000	usd
CY2022	wrb	Payments For Proceeds From Real Estate PaymentsForProceedsFromRealEstate	45920000	usd
CY2021	wrb	Payments For Proceeds From Real Estate PaymentsForProceedsFromRealEstate	-166886000	usd
CY2023	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	29719000	usd
CY2022	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	83212000	usd
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	27421000	usd
CY2023	wrb	Paymentsto Acquire Property Plantand Equipment Net PaymentstoAcquirePropertyPlantandEquipmentNet	53080000	usd
CY2022	wrb	Paymentsto Acquire Property Plantand Equipment Net PaymentstoAcquirePropertyPlantandEquipmentNet	52684000	usd
CY2021	wrb	Paymentsto Acquire Property Plantand Equipment Net PaymentstoAcquirePropertyPlantandEquipmentNet	66634000	usd
CY2023	wrb	Increase Decrease In Broker Dealer Related Receivables Payables Investing Activities IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesInvestingActivities	33929000	usd
CY2022	wrb	Increase Decrease In Broker Dealer Related Receivables Payables Investing Activities IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesInvestingActivities	-14337000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-264325000	usd
CY2021	wrb	Increase Decrease In Broker Dealer Related Receivables Payables Investing Activities IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesInvestingActivities	17983000	usd
CY2023	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	96567000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	906789000	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	11558000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	49572000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1961964000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1891355000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2989146000	usd
CY2023	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	974000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3309000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1034107000	usd
CY2023	us-gaap	Repayments Of Debt RepaymentsOfDebt	0	usd
CY2022	us-gaap	Repayments Of Debt RepaymentsOfDebt	426503000	usd
CY2021	us-gaap	Repayments Of Debt RepaymentsOfDebt	504952000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	501456000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	235192000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	355736000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	537163000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	94140000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	122426000	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-22902000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-12848000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-45162000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1062495000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-771992000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5831000	usd
CY2023	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9070000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-24754000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-4195000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-86151000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-119497000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-803523000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1449346000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1568843000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2372366000	usd
CY2023Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	31000000	usd
CY2022Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	33000000	usd
CY2023Q4	wrb	Increase Decrease In Earned Unbilled Audit Premiums IncreaseDecreaseInEarnedUnbilledAuditPremiums	19000000	usd
CY2022Q4	wrb	Increase Decrease In Earned Unbilled Audit Premiums IncreaseDecreaseInEarnedUnbilledAuditPremiums	25000000	usd
CY2021Q4	wrb	Increase Decrease In Earned Unbilled Audit Premiums IncreaseDecreaseInEarnedUnbilledAuditPremiums	10000000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	11663450	shares
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-983803000	usd
CY2023	us-gaap	Depreciation Depreciation	51000000	usd
CY2022	us-gaap	Depreciation Depreciation	52000000	usd
CY2021	us-gaap	Depreciation Depreciation	52000000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	114000000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	138000000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	141000000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	332000000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	295000000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	244000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	392903000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	32192000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	425095000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	86350000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	86350000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	306553000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	32192000	usd
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CY2023	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	8935000	usd
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CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	72000000	usd
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CY2022	wrb	Changein Unrealized Gainlosson Investments Including Portion Attributableto Noncontrolling Interest ChangeinUnrealizedGainlossonInvestmentsIncludingPortionAttributabletoNoncontrollingInterest	2000	usd
CY2021	wrb	Changein Unrealized Gainlosson Investments Including Portion Attributableto Noncontrolling Interest ChangeinUnrealizedGainlossonInvestmentsIncludingPortionAttributabletoNoncontrollingInterest	2000	usd
CY2023	wrb	Changein Unrealized Gainlosson Investments Including Portion Attributableto Noncontrolling Interest Netof Tax ChangeinUnrealizedGainlossonInvestmentsIncludingPortionAttributabletoNoncontrollingInterestNetofTax	306551000	usd
CY2022	wrb	Changein Unrealized Gainlosson Investments Including Portion Attributableto Noncontrolling Interest Netof Tax ChangeinUnrealizedGainlossonInvestmentsIncludingPortionAttributabletoNoncontrollingInterestNetofTax	-983805000	usd
CY2021	wrb	Changein Unrealized Gainlosson Investments Including Portion Attributableto Noncontrolling Interest Netof Tax ChangeinUnrealizedGainlossonInvestmentsIncludingPortionAttributabletoNoncontrollingInterestNetofTax	-198814000	usd
CY2023Q2	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	89000000	usd
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	72000000	usd
CY2022Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	251000000	usd
CY2022	wrb	Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleListNotDisclosedFlag	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7.5pt;font-weight:700;line-height:100%">Earnings (Losses)</span>
CY2023	wrb	Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleListNotDisclosedFlag	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7.5pt;font-weight:700;line-height:100%">Earnings (Losses)</span>
CY2023Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet	16051744000	usd
CY2023Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	3077832000	usd
CY2023Q4	us-gaap	Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount	389924000	usd
CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	18739652000	usd
CY2023	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="margin-bottom:6pt;margin-top:1pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The table below provides a reconciliation of the beginning and ending reserve balances:</span></div><div style="margin-top:11pt"><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:55.212%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:13.651%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.509%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.375%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.509%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.944%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:700;line-height:100%;text-decoration:underline">(In thousands)</span></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:8.5pt;font-weight:700;line-height:100%">2023</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:8.5pt;font-weight:700;line-height:100%">2022</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:8.5pt;font-weight:700;line-height:100%">2021</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:8.5pt;font-weight:400;line-height:100%">Net reserves at beginning of year</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:8.5pt;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:8.5pt;font-weight:400;line-height:100%">14,248,879 </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:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">12,848,362 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</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:8.5pt;font-weight:400;line-height:100%">11,620,393 </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="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></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:8.5pt;font-weight:400;line-height:100%">Net provision for losses and loss expenses:</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><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 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Claims occurring during the current year (1)</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:8.5pt;font-weight:400;line-height:100%">6,311,780 </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:8.5pt;font-weight:400;line-height:100%">5,774,713 </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:8.5pt;font-weight:400;line-height:100%">4,921,191 </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 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Increase in estimates for claims occurring in prior years (2)</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:8.5pt;font-weight:400;line-height:100%">29,681 </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:8.5pt;font-weight:400;line-height:100%">54,511 </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:8.5pt;font-weight:400;line-height:100%">863 </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 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Loss reserve discount accretion</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:8.5pt;font-weight:400;line-height:100%">30,681 </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:8.5pt;font-weight:400;line-height:100%">32,526 </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:8.5pt;font-weight:400;line-height:100%">31,906 </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 2px 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Total</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:8.5pt;font-weight:400;line-height:100%">6,372,142 </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:8.5pt;font-weight:400;line-height:100%">5,861,750 </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:8.5pt;font-weight:400;line-height:100%">4,953,960 </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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Net payments for claims:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%"> </span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%"> </span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%"> </span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Current year</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:8.5pt;font-weight:400;line-height:100%">1,217,078 </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:8.5pt;font-weight:400;line-height:100%">1,068,577 </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:8.5pt;font-weight:400;line-height:100%">887,896 </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 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Prior 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:8.5pt;font-weight:400;line-height:100%">3,764,532 </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:8.5pt;font-weight:400;line-height:100%">3,279,333 </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:8.5pt;font-weight:400;line-height:100%">2,777,798 </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 2px 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Total</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:8.5pt;font-weight:400;line-height:100%">4,981,610 </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:8.5pt;font-weight:400;line-height:100%">4,347,910 </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:8.5pt;font-weight:400;line-height:100%">3,665,694 </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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Foreign currency translation</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:8.5pt;font-weight:400;line-height:100%">22,409 </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:8.5pt;font-weight:400;line-height:100%">(113,323)</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:8.5pt;font-weight:400;line-height:100%">(60,297)</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:8.5pt;font-weight:400;line-height:100%">Net reserves at end of year</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:8.5pt;font-weight:400;line-height:100%">15,661,820 </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:8.5pt;font-weight:400;line-height:100%">14,248,879 </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:8.5pt;font-weight:400;line-height:100%">12,848,362 </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"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Ceded reserve at end of 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:8.5pt;font-weight:400;line-height:100%">3,077,832 </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:8.5pt;font-weight:400;line-height:100%">2,762,344 </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:8.5pt;font-weight:400;line-height:100%">2,542,526 </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:8.5pt;font-weight:400;line-height:100%">Gross reserves at end of year</span></td><td style="background-color:#ffffff;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:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">18,739,652 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;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:8.5pt;font-weight:400;line-height:100%">17,011,223 </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 style="background-color:#ffffff;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:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;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:8.5pt;font-weight:400;line-height:100%">15,390,888 </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 style="height:15pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></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:8.5pt;font-weight:400;line-height:100%">Net change in premiums and losses occurring in prior years:</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><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;text-indent:9pt;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Increase in estimates for claims occurring in prior years (2)</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">(29,681)</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 style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">(54,511)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">(863)</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;text-indent:9pt;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Retrospective premium adjustments for claims occurring in prior years (3)</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:8.5pt;font-weight:400;line-height:100%">10,782 </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:8.5pt;font-weight:400;line-height:100%">18,106 </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:8.5pt;font-weight:400;line-height:100%">7,510 </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;text-indent:9pt;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Net premium and reserve development on prior years</span></td><td style="background-color:#cceeff;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:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">(18,899)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;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:8.5pt;font-weight:400;line-height:100%">(36,405)</span></td><td style="background-color:#cceeff;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:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;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:8.5pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;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:8.5pt;font-weight:400;line-height:100%">6,647 </span></td><td style="background-color:#cceeff;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><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">_______________________________________</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(1)</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Claims occurring during the current year are net of loss reserve discounts of $47 million, $35 million and $21 million in 2023, 2022, and 2021, respectively.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(2)</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">The change in estimates for claims occurring in prior years is net of loss reserve discount. On an undiscounted basis, the estimates for claims occurring in prior years decreased by $13 million in 2023, increased by $16 million in 2022, and decreased by $19 million in 2021.</span></div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(3)</span>For certain retrospectively rated insurance polices and reinsurance agreements, changes in loss and loss expenses for prior years are offset by additional or return premiums.
CY2022Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	14248879000	usd
CY2021Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	12848362000	usd
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	11620393000	usd
CY2023	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	6311780000	usd
CY2022	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	5774713000	usd
CY2021	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	4921191000	usd
CY2023	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Incurred Claims Adjustment LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseIncurredClaimsAdjustment	-29681000	usd
CY2022	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Incurred Claims Adjustment LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseIncurredClaimsAdjustment	-54511000	usd
CY2021	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Incurred Claims Adjustment LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseIncurredClaimsAdjustment	-863000	usd
CY2023	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Loss Reserve Discount Accretion LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredLossReserveDiscountAccretion	-30681000	usd
CY2022	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Loss Reserve Discount Accretion LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredLossReserveDiscountAccretion	-32526000	usd
CY2021	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Loss Reserve Discount Accretion LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredLossReserveDiscountAccretion	-31906000	usd
CY2023	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	6372142000	usd
CY2022	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	5861750000	usd
CY2021	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	4953960000	usd
CY2023	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	1217078000	usd
CY2022	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	1068577000	usd
CY2021	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	887896000	usd
CY2023	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	3764532000	usd
CY2022	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	3279333000	usd
CY2021	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2777798000	usd
CY2023	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	4981610000	usd
CY2022	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	4347910000	usd
CY2021	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3665694000	usd
CY2023	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Foreign Exchange Translation LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseForeignExchangeTranslation	22409000	usd
CY2022	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Foreign Exchange Translation LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseForeignExchangeTranslation	-113323000	usd
CY2021	wrb	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Foreign Exchange Translation LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseForeignExchangeTranslation	-60297000	usd
CY2023Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	15661820000	usd
CY2022Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	14248879000	usd
CY2021Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	12848362000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables Gross ReinsuranceRecoverablesGross	3077832000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables Gross ReinsuranceRecoverablesGross	2762344000	usd
CY2021Q4	us-gaap	Reinsurance Recoverables Gross ReinsuranceRecoverablesGross	2542526000	usd
CY2023Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	18739652000	usd
CY2022Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	17011223000	usd
CY2021Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	15390888000	usd
CY2023	wrb	Increase Decreasein Estimatesfor Claims Occurringin Prior Years Premiumsand Losses IncreaseDecreaseinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	-29681000	usd
CY2022	wrb	Increase Decreasein Estimatesfor Claims Occurringin Prior Years Premiumsand Losses IncreaseDecreaseinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	-54511000	usd
CY2021	wrb	Increase Decreasein Estimatesfor Claims Occurringin Prior Years Premiumsand Losses IncreaseDecreaseinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	-863000	usd
CY2023	wrb	Retrospective Premium Adjustmentsin Estimatesfor Claims Occurringin Prior Years Premiumsand Losses RetrospectivePremiumAdjustmentsinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	10782000	usd
CY2022	wrb	Retrospective Premium Adjustmentsin Estimatesfor Claims Occurringin Prior Years Premiumsand Losses RetrospectivePremiumAdjustmentsinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	18106000	usd
CY2021	wrb	Retrospective Premium Adjustmentsin Estimatesfor Claims Occurringin Prior Years Premiumsand Losses RetrospectivePremiumAdjustmentsinEstimatesforClaimsOccurringinPriorYearsPremiumsandLosses	7510000	usd
CY2023	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	-18899000	usd
CY2022	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	-36405000	usd
CY2021	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	6647000	usd
CY2023Q4	wrb	Workers Compensation Discount Current Year Amount WorkersCompensationDiscountCurrentYearAmount	47000000	usd
CY2022Q4	wrb	Workers Compensation Discount Current Year Amount WorkersCompensationDiscountCurrentYearAmount	35000000	usd
CY2021Q4	wrb	Workers Compensation Discount Current Year Amount WorkersCompensationDiscountCurrentYearAmount	21000000	usd
CY2023	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Undiscounted Basis Prior Years Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsUndiscountedBasisPriorYearsIncreaseDecrease	13000000	usd
CY2022	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Undiscounted Basis Prior Years Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsUndiscountedBasisPriorYearsIncreaseDecrease	-16000000	usd
CY2021	wrb	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Undiscounted Basis Prior Years Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsUndiscountedBasisPriorYearsIncreaseDecrease	-19000000	usd
CY2023Q4	wrb	Liabilityfor Claimsand Claims Adjustment Expense Net Of Reinsurance LiabilityforClaimsandClaimsAdjustmentExpenseNetOfReinsurance	384000000	usd
CY2023Q4	wrb	Liabilityfor Claimsand Claims Adjustment Expense Net Of Reinsurance LiabilityforClaimsandClaimsAdjustmentExpenseNetOfReinsurance	384000000	usd
CY2023Q4	wrb	Liability For Claims And Claims Adjustment Expense Net Of Reinsurance Reported Claims Amount LiabilityForClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceReportedClaimsAmount	381000000	usd
CY2023Q4	wrb	Liability For Claims And Claims Adjustment Expense Net Of Reinsurance Incurred But Not Reported Ibnr Claims Amount LiabilityForClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceIncurredButNotReportedIBNRClaimsAmount	3000000	usd
CY2023	wrb	Liability For Claims And Claims Adjustment Expense Net Of Reinsurance Current Accident Year Losses LiabilityForClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceCurrentAccidentYearLosses	1000000	usd
CY2023	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	-19000000	usd
CY2022	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	-36000000	usd
CY2021	wrb	Favorable Unfavorable Reserve Development Net Of Premium Offsets FavorableUnfavorableReserveDevelopmentNetOfPremiumOffsets	7000000	usd
CY2023Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	17000000	usd
CY2022Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	20000000	usd
CY2023Q4	us-gaap	Workers Compensation Discount Prior Year Amount WorkersCompensationDiscountPriorYearAmount	1352000000	usd
CY2022Q4	us-gaap	Workers Compensation Discount Prior Year Amount WorkersCompensationDiscountPriorYearAmount	1464000000	usd
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CY2022Q4	wrb	Workers Compensation Discount After Effects Of Ceded Reinsurance Amount WorkersCompensationDiscountAfterEffectsOfCededReinsuranceAmount	416000000	usd
CY2022	us-gaap	Premium Receivable Credit Loss Expense Reversal PremiumReceivableCreditLossExpenseReversal	5442000	usd
CY2023Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	35110000	usd
CY2022Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	30660000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8400000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8100000	usd
CY2021Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	7700000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	0	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	10048000	usd
CY2023	us-gaap	Direct Premiums Written DirectPremiumsWritten	11676743000	usd
CY2022	us-gaap	Direct Premiums Written DirectPremiumsWritten	10695138000	usd
CY2021	us-gaap	Direct Premiums Written DirectPremiumsWritten	9531050000	usd
CY2023	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	1295263000	usd
CY2022	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	1213914000	usd
CY2021	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	1169084000	usd
CY2023	us-gaap	Ceded Premiums Written CededPremiumsWritten	2017539000	usd
CY2022	us-gaap	Ceded Premiums Written CededPremiumsWritten	1904982000	usd
CY2021	us-gaap	Ceded Premiums Written CededPremiumsWritten	1837267000	usd
CY2023	us-gaap	Premiums Written Net PremiumsWrittenNet	10954467000	usd
CY2022	us-gaap	Premiums Written Net PremiumsWrittenNet	10004070000	usd
CY2021	us-gaap	Premiums Written Net PremiumsWrittenNet	8862867000	usd
CY2023	us-gaap	Direct Premiums Earned DirectPremiumsEarned	11112980000	usd
CY2022	us-gaap	Direct Premiums Earned DirectPremiumsEarned	10217891000	usd
CY2021	us-gaap	Direct Premiums Earned DirectPremiumsEarned	8825568000	usd
CY2023	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1246288000	usd
CY2022	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1226801000	usd
CY2021	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1085804000	usd
CY2023	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1958581000	usd
CY2022	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1883263000	usd
CY2021	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1805341000	usd
CY2023	us-gaap	Premiums Earned Net PremiumsEarnedNet	10400687000	usd
CY2022	us-gaap	Premiums Earned Net PremiumsEarnedNet	9561429000	usd
CY2021	us-gaap	Premiums Earned Net PremiumsEarnedNet	8106031000	usd
CY2023	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	1376144000	usd
CY2022	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	1269338000	usd
CY2021	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	1236960000	usd
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	471841000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	477437000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	449739000	usd
CY2022Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	30660000	usd
CY2021Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	25218000	usd
CY2023	us-gaap	Premium Receivable Credit Loss Expense Reversal PremiumReceivableCreditLossExpenseReversal	4450000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8064000	usd
CY2021Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	7713000	usd
CY2023	us-gaap	Reinsurance Recoverable Credit Loss Expense Reversal ReinsuranceRecoverableCreditLossExpenseReversal	340000	usd
CY2022	us-gaap	Reinsurance Recoverable Credit Loss Expense Reversal ReinsuranceRecoverableCreditLossExpenseReversal	351000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8404000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8064000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8404000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	3534527000	usd
CY2022Q2	wrb	Line Of Credit Facility Increase Limit LineOfCreditFacilityIncreaseLimit	500000000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	352891000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-43456000	usd
CY2023	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	309435000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	44372000	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	16750000	usd
CY2023	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	61122000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	397263000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-26706000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	370557000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	295849000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-27544000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	268305000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	42890000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	23532000	usd
CY2022	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	66422000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	338739000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4012000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	334727000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	239090000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2752000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	241842000	usd
CY2021	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	10048000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	239090000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12800000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251890000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1430000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1240000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1224000000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	324000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	480000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	59000000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	368425000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	361133000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	269410000	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	8361000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	10815000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	11380000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-10883000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-28064000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2974000	usd
CY2023	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5461000	usd
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-453000	usd
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2368000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	12271000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8976000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4230000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3644000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3950000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-10976000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	370557000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	334727000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251890000	usd
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CY2023Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	126693000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	228456000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	59154000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	58182000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	12691000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	5935000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	68062000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	63313000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	78025000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	72536000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	776519000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	800929000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	36283000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	47166000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	740236000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	753763000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	15205000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	13973000	usd
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CY2023Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	176281000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	157055000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	43501000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	45887000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	161867000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	125525000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	66525000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	67479000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	473273000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	424762000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	266963000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	329001000	usd
CY2023Q4	us-gaap	Taxes Payable Current And Noncurrent TaxesPayableCurrentAndNoncurrent	46000000	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	5000000	usd
CY2023Q4	us-gaap	Tax Credit Carryforward Valuation Allowance TaxCreditCarryforwardValuationAllowance	36000000	usd
CY2022Q4	us-gaap	Tax Credit Carryforward Valuation Allowance TaxCreditCarryforwardValuationAllowance	47000000	usd
CY2023Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	261000000	usd
CY2023Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	1200000000	usd
CY2023	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	1176255000	usd
CY2022	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	1358813000	usd
CY2021	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	1040342000	usd
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CY2022Q4	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Balance StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance	8330587000	usd
CY2021Q4	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Balance StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance	6817535000	usd
CY2023Q4	wrb	Statutory Accounting Practices Statutory Capitaland Surplus Total Increase Decrease Effecton Balance StatutoryAccountingPracticesStatutoryCapitalandSurplusTotalIncreaseDecreaseEffectonBalance	159000000	usd
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CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	24900000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	23206000	usd
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CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	276852	shares
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CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	273298	shares
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	279749	shares
CY2023	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	11663450	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	264546100	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	265170882	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	266737725	shares
CY2023	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	706333	shares
CY2022	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	745612	shares
CY2021	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1062086	shares
CY2023	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	8707676	shares
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1370394	shares
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2628929	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	256544757	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	264546100	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	265170882	shares
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	84014000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	257663000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	39042000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	218621000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	25725000	usd
CY2023	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	usd
CY2022	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	usd
CY2023	wrb	Commitmentto Investin Certain Investment Funds CommitmenttoInvestinCertainInvestmentFunds	339000000	usd
CY2023	wrb	Commitmentto Investin Real Estate Construction Projects CommitmenttoInvestinRealEstateConstructionProjects	106000000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	44256000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	43383000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	49910000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	43871000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	53753000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	28075000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	176496000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	169271000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	218621000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	204088000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y1M6D
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CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0440
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$WRB
BERKLEY W R CORP Stock $wrb

2024 Q1 Form 10-K Financial Statement

#000001154424000005 Filed on February 23, 2024

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$WRB BERKLEY W R CORP Stock $wrb

2024 Q1 Form 10-K Financial Statement

#000001154424000005 Filed on February 23, 2024

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$WRB
BERKLEY W R CORP Stock $wrb