$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori

$ori Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000007426021000021 Filed on March 01, 2021

Income Statement

Concept	2019 Q4	2019 Q3	2019 Q2
Revenue	$2.002B	$1.844B	$1.700B
YoY Change	56.29%	3.61%	4.25%
Cost Of Revenue		$659.5M	$629.9M
YoY Change		7.22%	4.81%
Gross Profit		$1.185B	$1.070B
YoY Change		1.71%	3.92%
Gross Profit Margin		64.24%	62.95%
Selling, General & Admin	$10.10M	$4.200M	$5.300M
YoY Change	87.04%	0.0%	-15.87%
% of Gross Profit		0.35%	0.5%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses	$1.823B	$1.509B	$1.429B
YoY Change	10.63%	5.17%	3.99%
Operating Profit		-$324.2M	-$358.6M
YoY Change		20.12%	4.18%
Interest Expense	$151.0M	$47.60M	$15.90M
YoY Change	-147.28%	-59.83%	-49.2%
% of Operating Profit
Other Income/Expense, Net	$100.0K	-$200.0K	-$200.0K
YoY Change		0.0%	0.0%
Pretax Income	$346.1M	$252.4M	$205.4M
YoY Change	-351.53%	-24.68%	-16.71%
Income Tax	$70.30M	$49.50M	$39.90M
% Of Pretax Income	20.31%	19.61%	19.43%
Net Earnings	$275.8M	$202.8M	$165.5M
YoY Change	-358.97%	-26.31%	-16.29%
Net Earnings / Revenue	13.78%	11.0%	9.74%
Basic Earnings Per Share	$0.92	$0.68	$0.55
Diluted Earnings Per Share	$0.91	$0.67	$0.55
COMMON SHARES
Basic Shares Outstanding	300.1M shares	299.9M shares	299.4M shares
Diluted Shares Outstanding	301.6M shares	301.4M shares	300.8M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$78.80M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill	$175.1M
YoY Change	0.63%
Intangibles
YoY Change
Long-Term Investments	$14.36B	$13.98B	$13.89B
YoY Change	50459.86%	73067.54%	54366.67%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$21.08B	$21.18B	$20.99B
YoY Change	9.05%	6.97%	7.88%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
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	$663.0M	$690.0M	$632.0M
YoY Change	23.69%	21.27%	18.13%
LONG-TERM LIABILITIES
Long-Term Debt	$974.0M	$974.0M	$975.0M
YoY Change	-0.71%	-0.71%	0.1%
Other Long-Term Liabilities	$475.0M	$545.0M	$488.0M
YoY Change	64.36%	79.28%	80.07%
Total Long-Term Liabilities	$1.449B	$1.519B	$1.463B
YoY Change	14.09%	18.21%	17.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$663.0M	$690.0M	$632.0M
Total Long-Term Liabilities	$1.449B	$1.519B	$1.463B
Total Liabilities	$15.08B	$15.39B	$15.09B
YoY Change	6.31%	6.19%	5.18%
SHAREHOLDERS EQUITY
Retained Earnings	$4.386B	$4.170B	$4.327B
YoY Change	13.93%	3.87%	13.93%
Common Stock	$1.601B	$1.599B	$1.592B
YoY Change	1.32%	1.3%	1.09%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.000B	$5.794B	$5.894B
YoY Change
Total Liabilities & Shareholders Equity	$21.08B	$21.18B	$20.99B
YoY Change	9.05%	6.97%	7.88%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$275.8M	$202.8M	$165.5M
YoY Change	-358.97%	-26.31%	-16.29%
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities	$270.2M	$352.7M	$177.3M
YoY Change	65.36%	13.88%	13.22%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$246.0M	$16.50M	-$114.2M
YoY Change	122.02%	-106.66%	91.29%
Cash From Investing Activities	-$246.0M	$16.50M	-$114.2M
YoY Change	122.02%	-106.66%	91.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-54.80M	-359.5M	-56.10M
YoY Change	-18.69%	559.63%	-39.29%
NET CHANGE
Cash From Operating Activities	270.2M	352.7M	177.3M
Cash From Investing Activities	-246.0M	16.50M	-114.2M
Cash From Financing Activities	-54.80M	-359.5M	-56.10M
Net Change In Cash	-30.60M	9.700M	7.000M
YoY Change	106.76%	32.88%	55.56%
FREE CASH FLOW
Cash From Operating Activities	$270.2M	$352.7M	$177.3M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000074260
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9897600000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8537300000	USD
CY2020Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	3269700000	USD
CY2019Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	3089100000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1058200000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	304122180	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	303652553	shares
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.84
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.80
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.78
CY2018Q1	ori	Special Dividend Declared In December2017 And Paid In January2018 Amount SpecialDividendDeclaredInDecember2017AndPaidInJanuary2018Amount	269200000	USD
CY2019Q3	ori	Specialdividendpaidin September2019 SpecialdividendpaidinSeptember2019	303400000	USD
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2020Q4	ori	Liabilties Related To Escrow LiabiltiesRelatedToEscrow	1718100000	USD
CY2019Q4	ori	Liabilties Related To Escrow LiabiltiesRelatedToEscrow	1743000000.0	USD
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020	us-gaap	Common Stock Voting Rights CommonStockVotingRights	1
CY2020	ori	Reinsurance Unrecoverable Amount ReinsuranceUnrecoverableAmount	0	USD
CY2019	ori	Reinsurance Unrecoverable Amount ReinsuranceUnrecoverableAmount	0	USD
CY2020	ori	Entity Wide Revenue Major Customer Number EntityWideRevenueMajorCustomerNumber	1
CY2020	ori	Hombuyers Down Payment Percentage HombuyersDownPaymentPercentage	0.20
CY2020Q4	ori	Reinsurance Recoverables Policy And Claim Reserves ReinsuranceRecoverablesPolicyAndClaimReserves	4295100000	USD
CY2019Q4	ori	Reinsurance Recoverables Policy And Claim Reserves ReinsuranceRecoverablesPolicyAndClaimReserves	3755300000	USD
CY2018Q4	ori	Reinsurance Recoverables Policy And Claim Reserves ReinsuranceRecoverablesPolicyAndClaimReserves	3428600000	USD
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-10607
CY2020	dei	Entity Registrant Name EntityRegistrantName	OLD REPUBLIC INTERNATIONAL CORPORATION
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-2678171
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	307 North Michigan Avenue
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Chicago
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60601
CY2020	dei	City Area Code CityAreaCode	312
CY2020	dei	Local Phone Number LocalPhoneNumber	346-8100
CY2020	dei	Security12b Title Security12bTitle	Common Stock / $1 par value
CY2020	dei	Trading Symbol TradingSymbol	ORI
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	4514251137	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	304182380	shares
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10496800000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8796500000	USD
CY2020Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	749600000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	484300000	USD
CY2020Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	11246400000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	9280900000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1021700000	USD
CY2020Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	4054800000	USD
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CY2020Q4	us-gaap	Other Investments OtherInvestments	28800000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	26000000.0	USD
CY2020Q4	us-gaap	Investments Investments	15330100000	USD
CY2019Q4	us-gaap	Investments Investments	14359200000	USD
CY2020Q4	us-gaap	Cash Cash	118700000	USD
CY2019Q4	us-gaap	Cash Cash	78800000	USD
CY2020Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	86400000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	89300000	USD
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CY2020Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	0	USD
CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	5700000	USD
CY2020Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	205000000.0	USD
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CY2020Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	67600000	USD
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CY2020Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	328000000.0	USD
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CY2020Q4	us-gaap	Other Assets OtherAssets	790000000.0	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	748500000	USD
CY2020Q4	ori	Total Other Assets TotalOtherAssets	7485000000.0	USD
CY2019Q4	ori	Total Other Assets TotalOtherAssets	6717100000	USD
CY2020Q4	us-gaap	Assets Assets	22815200000	USD
CY2019Q4	us-gaap	Assets Assets	21076300000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	10671000000.0	USD
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CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	4200000	USD
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CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	474100000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Liabilities Liabilities	16628500000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	15076100000	USD
CY2020Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2019Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
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CY2019	ori	Total Premiums And Fees TotalPremiumsAndFees	6241100000	USD
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CY2020	us-gaap	Net Investment Income NetInvestmentIncome	438900000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	450700000	USD
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CY2020	us-gaap	Other Income OtherIncome	131200000	USD
CY2019	us-gaap	Other Income OtherIncome	132600000	USD
CY2018	us-gaap	Other Income OtherIncome	121600000	USD
CY2020	ori	Total Operating Revenues TotalOperatingRevenues	7308000000.0	USD
CY2019	ori	Total Operating Revenues TotalOperatingRevenues	6824400000	USD
CY2018	ori	Total Operating Revenues TotalOperatingRevenues	6494400000	USD
CY2020	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	14200000	USD
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CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	-142000000.0	USD
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CY2020	us-gaap	Revenues Revenues	7166000000.0	USD
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CY2020	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	2472500000	USD
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CY2020	us-gaap	Policyholder Dividends PolicyholderDividends	18900000	USD
CY2019	us-gaap	Policyholder Dividends PolicyholderDividends	27300000	USD
CY2018	us-gaap	Policyholder Dividends PolicyholderDividends	19800000	USD
CY2020	ori	Underwriting Acquisition And Other Expenses UnderwritingAcquisitionAndOtherExpenses	3942400000	USD
CY2019	ori	Underwriting Acquisition And Other Expenses UnderwritingAcquisitionAndOtherExpenses	3525400000	USD
CY2018	ori	Underwriting Acquisition And Other Expenses UnderwritingAcquisitionAndOtherExpenses	3317700000	USD
CY2020	ori	Interest And Other Charges InterestAndOtherCharges	43700000	USD
CY2019	ori	Interest And Other Charges InterestAndOtherCharges	40000000.0	USD
CY2018	ori	Interest And Other Charges InterestAndOtherCharges	42200000	USD
CY2020	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	6477500000	USD
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CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	5820700000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	688400000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1322400000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	438100000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	156900000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	238400000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	114100000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27100000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27400000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-46500000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	129700000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	265900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	67500000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	558600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.52
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.51
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	298407921	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299885468	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294248871	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298898673	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301227715	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301016076	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	558600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	335500000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	357200000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-226400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-7100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-6500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-3100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	342700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	363800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-223200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	72300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	76600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-46900000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	270300000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	287200000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-176300000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	88400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	11000000.0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-3600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	3600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	4100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	3200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	84800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	6800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-6900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-17800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1400000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	67000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5400000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-5400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	2900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	5900000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-11100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	206300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	287700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-182000000.0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	765000000.0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1344200000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	188500000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	558600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2020	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	2500000	USD
CY2019	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	8900000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	18400000	USD
CY2020	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	123400000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-32500000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	29300000	USD
CY2020	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-340700000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-214600000	USD
CY2018	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-148400000	USD
CY2020	us-gaap	Increase Decrease In Other Policyholder Funds IncreaseDecreaseInOtherPolicyholderFunds	34600000	USD
CY2019	us-gaap	Increase Decrease In Other Policyholder Funds IncreaseDecreaseInOtherPolicyholderFunds	32200000	USD
CY2018	us-gaap	Increase Decrease In Other Policyholder Funds IncreaseDecreaseInOtherPolicyholderFunds	95100000	USD
CY2020	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	18300000	USD
CY2019	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	-37200000	USD
CY2018	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	69500000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	0	USD
CY2019	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	-129800000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	15500000	USD
CY2020	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-77000000.0	USD
CY2019	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	9700000	USD
CY2018	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-13500000	USD
CY2020	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	14200000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	36600000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	58200000	USD
CY2020	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-156200000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	176200000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	88000000.0	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	30000000.0	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1185000000.0	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	936200000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	760500000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1280100000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	779000000.0	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	964000000.0	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	399500000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	663100000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	299100000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	162300000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	809900000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	402600000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	8800000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	33000000.0	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	19400000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2059300000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1702100000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1421900000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	321000000.0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-239500000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	815600000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	752500000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	50200000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	60900000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	51600000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1200000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	13100000	USD
CY2020	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	265000000.0	USD
CY2019	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	129700000	USD
CY2018	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-314200000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	300000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-100000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-845200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-424600000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	6700000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	13800000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	13100000	USD
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	8600000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	8400000	USD
CY2018	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	4700000	USD
CY2020	us-gaap	Origination Of Loans To Employee Stock Ownership Plans OriginationOfLoansToEmployeeStockOwnershipPlans	50000000.0	USD
CY2019	us-gaap	Origination Of Loans To Employee Stock Ownership Plans OriginationOfLoansToEmployeeStockOwnershipPlans	0	USD
CY2018	us-gaap	Origination Of Loans To Employee Stock Ownership Plans OriginationOfLoansToEmployeeStockOwnershipPlans	50000000.0	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	250100000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	538700000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	498800000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	2000000.0	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	200000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6000000.0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-300000000.0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-533100000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-546500000	USD
CY2020	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	39800000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-21400000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-25600000	USD
CY2019Q4	us-gaap	Cash Cash	78800000	USD
CY2018Q4	us-gaap	Cash Cash	100300000	USD
CY2017Q4	us-gaap	Cash Cash	125900000	USD
CY2020Q4	us-gaap	Cash Cash	118700000	USD
CY2019Q4	us-gaap	Cash Cash	78800000	USD
CY2018Q4	us-gaap	Cash Cash	100300000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	41400000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	42100000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	50800000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	149300000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	229400000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	137200000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	6186600000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	6000100000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	558600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2020	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	USD
CY2019	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	-2000000.0	USD
CY2018	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	971500000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	981600000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	5641500000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	5968400000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	3108000000.0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	3366500000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	176500000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	180200000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9897600000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10496800000	USD
CY2020Q4	ori	Bonds On Deposit With Governmental Authorities BondsOnDepositWithGovernmentalAuthorities	929300000	USD
CY2020	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-156200000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2020Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	749600000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	484300000	USD
CY2020	ori	Gross Investment Income GrossInvestmentIncome	445600000	USD
CY2019	ori	Gross Investment Income GrossInvestmentIncome	457700000	USD
CY2018	ori	Gross Investment Income GrossInvestmentIncome	438100000	USD
CY2020	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6600000	USD
CY2019	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6900000	USD
CY2018	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6200000	USD
CY2020	us-gaap	Net Investment Income NetInvestmentIncome	438900000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	450700000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	431800000	USD
CY2020	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	14200000	USD
CY2019	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	38600000	USD
CY2018	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	58200000	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	-2000000.0	USD
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CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	-142000000.0	USD
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CY2020	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-29800000	USD
CY2019	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	133800000	USD
CY2018	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-49600000	USD
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CY2019	ori	Net Realized Gains Losses NetRealizedGainsLosses	502200000	USD
CY2018	ori	Net Realized Gains Losses NetRealizedGainsLosses	-185900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	270300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	287200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-176300000	USD
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CY2019	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	541400000	USD
CY2018	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	508100000	USD
CY2020	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	501500000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	532200000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	489600000	USD
CY2020	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	2600000	USD
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CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	325400000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	316300000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	2224700000	USD
CY2020Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	196900000	USD
CY2019Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	209600000	USD
CY2018Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	216500000	USD
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CY2019	ori	Interest Accretion Amount InterestAccretionAmount	34500000	USD
CY2018	ori	Interest Accretion Amount InterestAccretionAmount	49000000.0	USD
CY2020Q4	ori	General Liability Insurance Face Amount GeneralLiabilityInsuranceFaceAmount	10000000.0	USD
CY2020Q4	us-gaap	Retention Payable RetentionPayable	500000	USD
CY2020Q4	ori	Liabilityfor Claimsand Claims Adjustment Expense Gross LiabilityforClaimsandClaimsAdjustmentExpenseGross	127600000	USD
CY2019Q4	ori	Liabilityfor Claimsand Claims Adjustment Expense Gross LiabilityforClaimsandClaimsAdjustmentExpenseGross	126800000	USD
CY2020Q4	ori	Liabilityfor Claimsand Claims Adjustment Expensefrom Asbestosisand Environmental Exposure LiabilityforClaimsandClaimsAdjustmentExpensefromAsbestosisandEnvironmentalExposure	82400000	USD
CY2019Q4	ori	Liabilityfor Claimsand Claims Adjustment Expensefrom Asbestosisand Environmental Exposure LiabilityforClaimsandClaimsAdjustmentExpensefromAsbestosisandEnvironmentalExposure	83300000	USD
CY2020	ori	Average Five Year Survival Ratio Duration Gross AverageFiveYearSurvivalRatioDurationGross	P6Y3M18D
CY2020	ori	Average Five Year Survival Ratio Duration Net AverageFiveYearSurvivalRatioDurationNet	7.1
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CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9929500000	USD
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CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9237600000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6679700000	USD
CY2018Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6464900000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6316400000	USD
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	2557800000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	2577600000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	2520700000	USD
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-83800000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-30900000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-77800000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	2474000000.0	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	2546600000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	2442900000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	795500000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	851500000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	842200000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	1337700000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	1480200000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	1452200000	USD
CY2020	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	2133200000	USD
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CY2020Q4	ori	Liability For Unpaid Claims And Claims Adjustment Expense Net Of Reinsurance Losses Recoverable LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceLossesRecoverable	7020400000	USD
CY2019Q4	ori	Liability For Unpaid Claims And Claims Adjustment Expense Net Of Reinsurance Losses Recoverable LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceLossesRecoverable	6679700000	USD
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CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9471200000	USD
CY2020	ori	One Year Development Of Consolidated Reserves OneYearDevelopmentOfConsolidatedReserves	0.013
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CY2019Q4	ori	Shortduration Insurance Contracts Discounted Liabilityfor Unpaid Claimsand Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsDiscountedLiabilityforUnpaidClaimsandAllocatedClaimAdjustmentExpenseNet	5766700000	USD
CY2020Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	3645100000	USD
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CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense Accumulated Unallocated Claim Adjustment Expense ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense	298300000	USD
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CY2020	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2019	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2018	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3100000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	558600000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1056400000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	373600000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	298407921	shares
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	299885468	shares
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	294248871	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	490752	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1342247	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1398329	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	5368876	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298898673	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301227715	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301016076	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.52
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.51
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2020	ori	Maximum Numberof Common Stock Shares Available Under2016 Stock Option Plan MaximumNumberofCommonStockSharesAvailableUnder2016StockOptionPlan	15000000.0	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	6900000	shares
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
CY2020Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Within One Year Of Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateWithinOneYearOfGrantDate	0.10
CY2020Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year One And Year Two Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearOneAndYearTwoGrantDate	0.15
CY2020Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Two And Year Three Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearTwoAndYearThreeGrantDate	0.20
CY2020Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Three And Year Four Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearThreeAndYearFourGrantDate	0.25
CY2020Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Four And Year Five Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearFourAndYearFiveGrantDate	0.30
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2100000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3700000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3800000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	400000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	700000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	800000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.17
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.18
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.20
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0572
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0410
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0403
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0072
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0254
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0281
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8009237	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.43
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7163567	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.24
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	6565019	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.76
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1901100	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.24
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1777500	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	21.14
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1539500	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.98
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	397653	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.44
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	848923	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.14
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	881917	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.86
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	18033	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	16.72
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	82907	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	17.05
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	59035	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	16.54
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9494651	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.36
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8009237	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.43
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7163567	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.24
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	6138602	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	17.81
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	5100009	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	17.18
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4556350	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.83
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.88
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.35
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.71
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9494651	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.36
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	6138602	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	17.81
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2700000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5700000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	12000000.0	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	11300000	USD
CY2020Q1	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1594000000.0	USD
CY2020Q2	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1571500000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2800000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	6800000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	7500000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	500000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	1400000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	1500000	USD
CY2020Q4	ori	Numberof Jurisdictions NumberofJurisdictions	16	jurisdiction
CY2020Q4	ori	Mortgage Guaranty Insurers Contingency Reserves MortgageGuarantyInsurersContingencyReserves	316700000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	966400000	USD
CY2020Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1113600000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	974000000.0	USD
CY2020	ori	Special Dividend Declared In December2020 And Paid In January2021 Amount Per Share SpecialDividendDeclaredInDecember2020AndPaidInJanuary2021AmountPerShare	1.00
CY2019Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1050000000.0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	21700000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	400000000.0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	550000000.0	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	42500000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	43200000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	47200000	USD
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75000000	shares
CY2020Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	699300000	USD
CY2020Q4	us-gaap	Dividends Receivable DividendsReceivable	472400000	USD
CY2019Q4	us-gaap	Dividends Receivable DividendsReceivable	399500000	USD
CY2018Q4	us-gaap	Dividends Receivable DividendsReceivable	412300000	USD
CY2020Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1764600000	USD
CY2020Q4	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1938800000	USD
CY2020Q1	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	-830000000.0	USD
CY2020Q2	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	455400000	USD
CY2020Q3	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	187100000	USD
CY2020Q4	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	484300000	USD
CY2020Q1	us-gaap	Revenues Revenues	764000000.0	USD
CY2020Q2	us-gaap	Revenues Revenues	2027000000.0	USD
CY2020Q3	us-gaap	Revenues Revenues	1951700000	USD
CY2020Q4	us-gaap	Revenues Revenues	2423200000	USD
CY2020Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1534000000.0	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	42900000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	33500000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	27100000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	96400000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	316800000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	69300000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	247600000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	59000000.0	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	50600000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	24400000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	100900000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	311600000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	73600000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	238000000.0	USD
CY2019	ori	Special Dividend Per Share Paid SpecialDividendPerSharePaid	1.00
CY2017	ori	Special Dividend Declared In December2017 And Paid In January2018 Amount Per Share SpecialDividendDeclaredInDecember2017AndPaidInJanuary2018AmountPerShare	1.00
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0537
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y7M6D
CY2020	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	73900000	USD
CY2019	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	73000000.0	USD
CY2018	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	69000000.0	USD
CY2020	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	64000000.0	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	64900000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	61300000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	54000000.0	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	43700000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	34000000.0	USD
CY2020Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1527800000	USD
CY2020Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1644700000	USD
CY2020Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1770900000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-604800000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	397700000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	246000000.0	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	519700000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.01
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.74
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.01
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.74
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	300280398	shares
CY2019Q2	us-gaap	Revenues Revenues	1700000000.0	USD
CY2019Q3	us-gaap	Revenues Revenues	1844000000.0	USD
CY2019Q4	us-gaap	Revenues Revenues	2001900000	USD
CY2019Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1395900000	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1494600000	USD
CY2019Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1591600000	USD
CY2019Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1655900000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	412200000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	165500000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	202800000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	275800000	USD
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	297523559	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	297729418	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	297960133	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	300280398	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	297776315	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	297990822	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298474209	shares
CY2019Q1	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1434200000	USD
CY2019Q2	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1550000000.0	USD
CY2019Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1667600000	USD
CY2019Q4	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1721600000	USD
CY2019Q1	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	480100000	USD
CY2019Q2	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	150000000.0	USD
CY2019Q3	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	176300000	USD
CY2019Q4	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	280200000	USD
CY2019Q1	us-gaap	Revenues Revenues	1914400000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.38
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.37
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.67
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299020956	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299418182	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299894995	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	300138720	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	300172853	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	300752992	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301384364	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301557866	shares
CY2020Q4	ori	Number Of Major Segments NumberOfMajorSegments	3	segment
CY2020	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.10
CY2020	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	14200000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	36600000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	58200000	USD
CY2020	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-156200000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	-142000000.0	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	636100000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-235600000	USD
CY2020	us-gaap	Revenues Revenues	7166000000.0	USD
CY2019	us-gaap	Revenues Revenues	7460500000	USD
CY2018	us-gaap	Revenues Revenues	6258800000	USD
CY2020	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	14200000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	36600000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	58200000	USD
CY2020	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-156200000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	-142000000.0	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	636100000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-235600000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	688400000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1322400000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	438100000	USD
CY2020	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-29800000	USD
CY2019	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	133800000	USD
CY2018	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-49600000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	129700000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	265900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	67500000	USD
CY2020Q4	us-gaap	Assets Assets	22815200000	USD
CY2019Q4	us-gaap	Assets Assets	21076300000	USD
CY2020Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	10647300000	USD
CY2020Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	11246400000	USD
CY2020Q4	us-gaap	Investment Owned At Cost InvestmentOwnedAtCost	13945900000	USD
CY2020Q4	us-gaap	Investments Investments	15330100000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	558600000	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	328000000.0	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	10671000000.0	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	2397100000	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Other Policy Claims And Benefits Payable SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable	195900000	USD
CY2020	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	6345800000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	325400000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	9929500000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	2224700000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Other Policy Claims And Benefits Payable SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable	194400000	USD
CY2019	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	5919900000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	316300000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	9471200000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	2104900000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Other Policy Claims And Benefits Payable SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable	198600000	USD
CY2018	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	5651100000	USD
CY2020	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	438900000	USD
CY2020	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	2491400000	USD
CY2020	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	501500000	USD
CY2020	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	3484500000	USD
CY2020	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	6382100000	USD
CY2019	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	450700000	USD
CY2019	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	2572700000	USD
CY2019	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	532200000	USD
CY2019	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	3033100000	USD
CY2019	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	5954800000	USD
CY2018	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	431800000	USD
CY2018	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	2460700000	USD
CY2018	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	489600000	USD
CY2018	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	2870200000	USD
CY2018	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	5752400000	USD
CY2020	us-gaap	Direct Premiums Earned DirectPremiumsEarned	7993200000	USD
CY2020	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1718900000	USD
CY2020	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	71500000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	6345800000	USD
CY2020	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.011
CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	7358200000	USD
CY2019	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1495800000	USD
CY2019	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	57400000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	5919900000	USD
CY2019	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.010
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	6926100000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1329700000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	54600000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	5651100000	USD
CY2018	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.010

Files In Submission

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$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori

2019 Q4 Form 10-K Financial Statement

#000007426021000021 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ORI OLD REPUBLIC INTERNATIONAL CORP Stock $ori

2019 Q4 Form 10-K Financial Statement

#000007426021000021 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori