$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori

$ori Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000007426020000024 Filed on February 28, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$1.281B	$1.780B	$1.631B
YoY Change	-25.8%	11.72%	8.79%
Cost Of Revenue		$615.1M	$601.0M
YoY Change		-18.96%	-1.28%
Gross Profit		$1.165B	$1.030B
YoY Change		39.64%	15.67%
Gross Profit Margin		65.44%	63.14%
Selling, General & Admin	$5.400M	$4.200M	$6.300M
YoY Change	170.0%	-42.47%	6.78%
% of Gross Profit		0.36%	0.61%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses	$1.648B	$1.435B	$1.374B
YoY Change	21.46%	-5.46%	2.81%
Operating Profit		-$269.9M	-$344.2M
YoY Change		-60.51%	-22.86%
Interest Expense	-$319.4M	$118.5M	$31.30M
YoY Change	2072.79%	-850.0%	-295.63%
% of Operating Profit
Other Income/Expense, Net		-$200.0K	-$200.0K
YoY Change		-33.33%	-50.0%
Pretax Income	-$137.6M	$335.1M	$246.6M
YoY Change	-138.78%	462.25%	68.56%
Income Tax	-$31.10M	$59.80M	$48.80M
% Of Pretax Income		17.85%	19.79%
Net Earnings	-$106.5M	$275.2M	$197.7M
YoY Change	-135.55%	496.96%	94.59%
Net Earnings / Revenue	-8.31%	15.46%	12.12%
Basic Earnings Per Share	-$0.36	$0.92	$0.66
Diluted Earnings Per Share	-$0.36	$0.92	$0.66
COMMON SHARES
Basic Shares Outstanding	299.1M shares	299.0M shares	299.7M shares
Diluted Shares Outstanding	299.1M shares	300.4M shares	301.1M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
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	$174.0M
YoY Change	8.28%
Intangibles
YoY Change
Long-Term Investments	$28.40M	$19.10M	$25.50M
YoY Change	121.88%	1.6%	18.6%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$19.33B	$19.80B	$19.45B
YoY Change	-0.39%	0.28%	0.5%
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	$536.0M	$569.0M	$535.0M
YoY Change	-18.17%	16.36%	18.89%
LONG-TERM LIABILITIES
Long-Term Debt	$981.0M	$981.0M	$974.0M
YoY Change	-32.3%	-35.76%	-36.17%
Other Long-Term Liabilities	$289.0M	$304.0M	$271.0M
YoY Change	-50.68%	-5.88%	-8.14%
Total Long-Term Liabilities	$1.270B	$1.285B	$1.245B
YoY Change	-37.59%	-30.54%	-31.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$536.0M	$569.0M	$535.0M
Total Long-Term Liabilities	$1.270B	$1.285B	$1.245B
Total Liabilities	$14.18B	$14.49B	$14.35B
YoY Change	-3.34%	-3.5%	-2.34%
SHAREHOLDERS EQUITY
Retained Earnings	$3.850B	$4.015B	$3.798B
YoY Change	20.05%	20.81%	14.17%
Common Stock	$1.580B	$1.578B	$1.575B
YoY Change	45.73%	57.9%	58.16%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$5.146B	$5.311B	$5.103B
YoY Change
Total Liabilities & Shareholders Equity	$19.33B	$19.80B	$19.45B
YoY Change	-0.39%	0.28%	0.5%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	-$106.5M	$275.2M	$197.7M
YoY Change	-135.55%	496.96%	94.59%
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities	$163.4M	$309.7M	$156.6M
YoY Change	-335.45%	17.62%	38.95%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$110.8M	-$247.9M	-$59.70M
YoY Change	-215.42%	-8.83%	30.63%
Cash From Investing Activities	-$110.8M	-$247.9M	-$59.70M
YoY Change	-215.42%	-8.83%	30.63%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-67.40M	-54.50M	-92.40M
YoY Change	68.92%	15.71%	87.42%
NET CHANGE
Cash From Operating Activities	163.4M	309.7M	156.6M
Cash From Investing Activities	-110.8M	-247.9M	-59.70M
Cash From Financing Activities	-67.40M	-54.50M	-92.40M
Net Change In Cash	-14.80M	7.300M	4.500M
YoY Change	11.28%	-113.11%	-74.58%
FREE CASH FLOW
Cash From Operating Activities	$163.4M	$309.7M	$156.6M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000074260
CY2019	ori	Entity Wide Revenue Major Customer Number EntityWideRevenueMajorCustomerNumber	1
CY2019	ori	Hombuyers Down Payment Percentage HombuyersDownPaymentPercentage	0.20
CY2018Q4	ori	Liabilties Related To Escrow LiabiltiesRelatedToEscrow	1701000000	USD
CY2019Q4	ori	Liabilties Related To Escrow LiabiltiesRelatedToEscrow	1743000000	USD
CY2017Q4	ori	Reinsurance Recoverables Policy And Claim Reserves ReinsuranceRecoverablesPolicyAndClaimReserves	3311300000	USD
CY2018	ori	Reinsurance Unrecoverable Amount ReinsuranceUnrecoverableAmount	0	USD
CY2019	ori	Reinsurance Unrecoverable Amount ReinsuranceUnrecoverableAmount	0	USD
CY2018	ori	Specialdividenddeclaredin December2017andpaidin January2018 SpecialdividenddeclaredinDecember2017andpaidinJanuary2018	269200000	USD
CY2019	ori	Specialdividendpaidin September2019 SpecialdividendpaidinSeptember2019	303400000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8285000000	USD
CY2018Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	3039100000	USD
CY2019Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	3089100000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.76
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.78
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.80
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2018Q4	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
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	302714502	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	303652553	shares
CY2019	us-gaap	Common Stock Voting Rights CommonStockVotingRights	1
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1034500000	USD
CY2017	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
CY2018Q4	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
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-10607
CY2019	dei	Entity Registrant Name EntityRegistrantName	OLD REPUBLIC INTERNATIONAL CORPORATION
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-2678171
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	307 North Michigan Avenue
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Chicago
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60601
CY2019	dei	City Area Code CityAreaCode	312
CY2019	dei	Local Phone Number LocalPhoneNumber	346-8100
CY2019	dei	Security12b Title Security12bTitle	Common Stock / $1 par value
CY2019	dei	Trading Symbol TradingSymbol	ORI
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	6262651216	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	303792662	shares
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	178400000	USD
CY2018Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	166200000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	68500000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8796500000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8182800000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	484300000	USD
CY2018Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	354900000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	9280900000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	8537800000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1021700000	USD
CY2018Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1044800000	USD
CY2019Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	4030500000	USD
CY2018Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	3380900000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	26000000.0	USD
CY2018Q4	us-gaap	Other Investments OtherInvestments	31000000.0	USD
CY2019Q4	us-gaap	Investments Investments	14359200000	USD
CY2018Q4	us-gaap	Investments Investments	12994600000	USD
CY2019Q4	us-gaap	Cash Cash	78800000	USD
CY2018Q4	us-gaap	Cash Cash	100300000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	89300000	USD
CY2018Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	92400000	USD
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CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	5700000	USD
CY2018Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	16800000	USD
CY2019Q4	us-gaap	Prepaid Taxes PrepaidTaxes	0	USD
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CY2018Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	55900000	USD
CY2019Q4	ori	Reinsurance Recoverables Policy And Claim Reserves ReinsuranceRecoverablesPolicyAndClaimReserves	3755300000	USD
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CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	325400000	USD
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CY2019Q4	us-gaap	Other Assets OtherAssets	748500000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	526300000	USD
CY2019Q4	ori	Total Other Assets TotalOtherAssets	6717100000	USD
CY2018Q4	ori	Total Other Assets TotalOtherAssets	6332400000	USD
CY2019Q4	us-gaap	Assets Assets	21076300000	USD
CY2018Q4	us-gaap	Assets Assets	19327100000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9929500000	USD
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CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	2224700000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	2104900000	USD
CY2019Q4	ori	Other Policholders Benefits And Funds OtherPolicholdersBenefitsAndFunds	194400000	USD
CY2018Q4	ori	Other Policholders Benefits And Funds OtherPolicholdersBenefitsAndFunds	198600000	USD
CY2019Q4	ori	Total Policy Liabilities And Accruals TotalPolicyLiabilitiesAndAccruals	12348700000	USD
CY2018Q4	ori	Total Policy Liabilities And Accruals TotalPolicyLiabilitiesAndAccruals	11774800000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	550900000	USD
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CY2019Q4	ori	Reinsurance Balances And Funds Held ReinsuranceBalancesAndFundsHeld	616000000.0	USD
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CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	112200000	USD
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CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	974000000.0	USD
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CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	288300000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2018Q4	us-gaap	Liabilities Liabilities	14180800000	USD
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CY2018Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
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CY2019Q4	ori	Unallocated Essop Shares UnallocatedEssopShares	64800000	USD
CY2018Q4	ori	Unallocated Essop Shares UnallocatedEssopShares	73900000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	6000100000	USD
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CY2017	us-gaap	Other Income OtherIncome	102200000	USD
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CY2018	ori	Total Operating Revenues TotalOperatingRevenues	6257400000	USD
CY2017	ori	Total Operating Revenues TotalOperatingRevenues	6051500000	USD
CY2019	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	36600000	USD
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CY2019	us-gaap	Policyholder Dividends PolicyholderDividends	27300000	USD
CY2018	us-gaap	Policyholder Dividends PolicyholderDividends	19800000	USD
CY2017	us-gaap	Policyholder Dividends PolicyholderDividends	19500000	USD
CY2019	ori	Underwriting Acquisition And Other Expenses UnderwritingAcquisitionAndOtherExpenses	3278500000	USD
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CY2017	ori	Underwriting Acquisition And Other Expenses UnderwritingAcquisitionAndOtherExpenses	2995700000	USD
CY2019	ori	Interest And Other Charges InterestAndOtherCharges	40000000.0	USD
CY2018	ori	Interest And Other Charges InterestAndOtherCharges	42200000	USD
CY2017	ori	Interest And Other Charges InterestAndOtherCharges	63000000.0	USD
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CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	114100000	USD
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CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	238400000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	132600000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27400000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-46500000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	32200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	265900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	67500000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	164800000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	560500000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.52
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.14
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.51
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.92
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
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	262114533	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
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	299387373	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	560500000	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
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	325000000.0	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
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	211600000	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
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	113400000	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
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	39500000	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
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	73900000	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
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	28200000	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
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	500000	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
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	27700000	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
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-9700000	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
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	18000000.0	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
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	9500000	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
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	65400000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1344200000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	188500000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	626000000.0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	560500000	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
CY2017	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	23300000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-32500000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	29300000	USD
CY2017	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	79300000	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
CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	123700000	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
CY2017	us-gaap	Increase Decrease In Other Policyholder Funds IncreaseDecreaseInOtherPolicyholderFunds	152700000	USD
CY2019	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	-37200000	USD
CY2018	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	69500000	USD
CY2017	ori	Increase Decrease In Income Taxes Net IncreaseDecreaseInIncomeTaxesNet	-49500000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	-129800000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	15500000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	31800000	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
CY2017	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-25300000	USD
CY2019	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	36600000	USD
CY2018	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	58200000	USD
CY2017	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	211600000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2017	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	0	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
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	134500000	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
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	452800000	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
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1000600000	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
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	468400000	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
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	698500000	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
CY2017	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	30000000.0	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
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1607200000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	114500000	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
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	727200000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	60900000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	51600000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	54300000	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
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	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
CY2017	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-11800000	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
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	100000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-424600000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-239500000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-293900000	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
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17800000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	8400000	USD
CY2018	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	4700000	USD
CY2017	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	3900000	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
CY2017	us-gaap	Origination Of Loans To Employee Stock Ownership Plans OriginationOfLoansToEmployeeStockOwnershipPlans	0	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	538700000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	498800000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	198800000	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
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6400000	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
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-178500000	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
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-19700000	USD
CY2018Q4	us-gaap	Cash Cash	100300000	USD
CY2017Q4	us-gaap	Cash Cash	125900000	USD
CY2016Q4	us-gaap	Cash Cash	145700000	USD
CY2019Q4	us-gaap	Cash Cash	78800000	USD
CY2018Q4	us-gaap	Cash Cash	100300000	USD
CY2017Q4	us-gaap	Cash Cash	125900000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	42100000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	50800000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	62500000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	229400000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	137200000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	106300000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	6000100000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	5146200000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	370500000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	560500000	USD
CY2018Q4	ori	Other Than Temporary Impairments Minimum Percentage Decline OtherThanTemporaryImpairmentsMinimumPercentageDecline	0.20
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	2000000.0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1018300000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1022300000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	4931500000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	5057300000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2548700000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2676600000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	38500000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	40000000.0	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8537300000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8796500000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	1000000.0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	1000000.0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	380800000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	389800000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	639800000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	667300000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1021700000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1058200000	USD
CY2019Q4	ori	Bonds On Deposit With Governmental Authorities BondsOnDepositWithGovernmentalAuthorities	917500000	USD
CY2018Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	502100000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	484300000	USD
CY2018Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	354900000	USD
CY2019	ori	Gross Investment Income GrossInvestmentIncome	457700000	USD
CY2018	ori	Gross Investment Income GrossInvestmentIncome	438100000	USD
CY2017	ori	Gross Investment Income GrossInvestmentIncome	414100000	USD
CY2019	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6900000	USD
CY2018	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6200000	USD
CY2017	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	4600000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	450700000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	431800000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	409400000	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
CY2017	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	211600000	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	-2000000.0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2017	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	0	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	636100000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-235600000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	211600000	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
CY2017	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-30800000	USD
CY2019	ori	Net Realized Gains Losses NetRealizedGainsLosses	502200000	USD
CY2018	ori	Net Realized Gains Losses NetRealizedGainsLosses	-185900000	USD
CY2017	ori	Net Realized Gains Losses NetRealizedGainsLosses	242400000	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
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	73900000	USD
CY2017	ori	Taxreformdeferredtaxbenefitonunrezlizedgainslosses Taxreformdeferredtaxbenefitonunrezlizedgainslosses	104900000	USD
CY2019Q4	ori	Title Premium And Fee Revenues Stemming From Direct Operations TitlePremiumAndFeeRevenuesStemmingFromDirectOperations	0.27
CY2018Q4	ori	Title Premium And Fee Revenues Stemming From Direct Operations TitlePremiumAndFeeRevenuesStemmingFromDirectOperations	0.26
CY2017Q4	ori	Title Premium And Fee Revenues Stemming From Direct Operations TitlePremiumAndFeeRevenuesStemmingFromDirectOperations	0.27
CY2019	ori	Noninsurance Contract Revenue NoninsuranceContractRevenue	184300000	USD
CY2018	ori	Noninsurance Contract Revenue NoninsuranceContractRevenue	166800000	USD
CY2017	ori	Noninsurance Contract Revenue NoninsuranceContractRevenue	155100000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	316300000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	297800000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	274000000.0	USD
CY2019	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	541400000	USD
CY2018	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	508100000	USD
CY2017	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	477800000	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
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	454000000.0	USD
CY2019	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	9100000	USD
CY2018	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	18500000	USD
CY2017	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	23700000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	325400000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	316300000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	297800000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	2224700000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	2104900000	USD
CY2019Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	209600000	USD
CY2018Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	216500000	USD
CY2017Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	240700000	USD
CY2019	ori	Interest Accretion Amount InterestAccretionAmount	34500000	USD
CY2018	ori	Interest Accretion Amount InterestAccretionAmount	49000000.0	USD
CY2017	ori	Interest Accretion Amount InterestAccretionAmount	20400000	USD
CY2019Q4	ori	General Liability Insurance Face Amount GeneralLiabilityInsuranceFaceAmount	10000000.0	USD
CY2019Q4	us-gaap	Retention Payable RetentionPayable	500000	USD
CY2019Q4	ori	Liabilityfor Claimsand Claims Adjustment Expense Gross LiabilityforClaimsandClaimsAdjustmentExpenseGross	126800000	USD
CY2018Q4	ori	Liabilityfor Claimsand Claims Adjustment Expense Gross LiabilityforClaimsandClaimsAdjustmentExpenseGross	105800000	USD
CY2019Q4	ori	Liabilityfor Claimsand Claims Adjustment Expensefrom Asbestosisand Environmental Exposure LiabilityforClaimsandClaimsAdjustmentExpensefromAsbestosisandEnvironmentalExposure	83300000	USD
CY2018Q4	ori	Liabilityfor Claimsand Claims Adjustment Expensefrom Asbestosisand Environmental Exposure LiabilityforClaimsandClaimsAdjustmentExpensefromAsbestosisandEnvironmentalExposure	74400000	USD
CY2019	ori	Average Five Year Survival Ratio Duration Gross AverageFiveYearSurvivalRatioDurationGross	P6Y3M18D
CY2019	ori	Average Five Year Survival Ratio Duration Net AverageFiveYearSurvivalRatioDurationNet	P7Y2M12D
CY2018	ori	Average Five Year Survival Ratio Duration Gross AverageFiveYearSurvivalRatioDurationGross	P4Y3M18D
CY2018	ori	Average Five Year Survival Ratio Duration Net AverageFiveYearSurvivalRatioDurationNet	P5Y
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9471200000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9237600000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9206000000.0	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
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6439800000	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
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	2604900000	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
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-153800000	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
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	2451000000.0	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
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	1114300000	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
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	1460100000	USD
CY2019	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	2331700000	USD
CY2018	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	2294500000	USD
CY2017	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	2574400000	USD
CY2019Q4	ori	Liability For Unpaid Claims And Claims Adjustment Expense Net Of Reinsurance Losses Recoverable LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceLossesRecoverable	6679700000	USD
CY2018Q4	ori	Liability For Unpaid Claims And Claims Adjustment Expense Net Of Reinsurance Losses Recoverable LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceLossesRecoverable	6464900000	USD
CY2017Q4	ori	Liability For Unpaid Claims And Claims Adjustment Expense Net Of Reinsurance Losses Recoverable LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfReinsuranceLossesRecoverable	6316400000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9929500000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9471200000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9237600000	USD
CY2019	ori	One Year Development Of Consolidated Reserves OneYearDevelopmentOfConsolidatedReserves	0.005
CY2018	ori	One Year Development Of Consolidated Reserves OneYearDevelopmentOfConsolidatedReserves	0.012
CY2017	ori	One Year Development Of Consolidated Reserves OneYearDevelopmentOfConsolidatedReserves	0.024
CY2019	ori	Three Year Average Annual Development Of Consolidated Reserves ThreeYearAverageAnnualDevelopmentOfConsolidatedReserves	0.014
CY2019Q4	ori	Shortduration Insurance Contracts Discounted Liabilityfor Unpaid Claimsand Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsDiscountedLiabilityforUnpaidClaimsandAllocatedClaimAdjustmentExpenseNet	5766700000	USD
CY2018Q4	ori	Shortduration Insurance Contracts Discounted Liabilityfor Unpaid Claimsand Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsDiscountedLiabilityforUnpaidClaimsandAllocatedClaimAdjustmentExpenseNet	5535600000	USD
CY2019Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	3242800000	USD
CY2018Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	2992300000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claim Adjustment Expense Other Reconciling Item ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem	621500000	USD
CY2018Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claim Adjustment Expense Other Reconciling Item ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem	660500000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense Accumulated Unallocated Claim Adjustment Expense ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense	298300000	USD
CY2018Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense Accumulated Unallocated Claim Adjustment Expense ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense	282600000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claim Adjustment Expense Aggregate Reconciling Items ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseAggregateReconcilingItems	919900000	USD
CY2018Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claim Adjustment Expense Aggregate Reconciling Items ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseAggregateReconcilingItems	943200000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9929500000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9471200000	USD
CY2019Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	209600000	USD
CY2018Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	216500000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	63100000	USD
CY2018Q4	ori	Increasetodeferredtaxfrom Ir Spublisheddiscountrates IncreasetodeferredtaxfromIRSpublisheddiscountrates	36500000	USD
CY2019Q4	ori	Increasetodeferredtaxfrom Ir Spublisheddiscountrates IncreasetodeferredtaxfromIRSpublisheddiscountrates	6900000	USD
CY2017	ori	Reclassificationofincometaxeffectsofthe Tax Cutsand Jobs Act ReclassificationofincometaxeffectsoftheTaxCutsandJobsAct	85100000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.002
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.008
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.008
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.009
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.024
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0.032
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.087
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.002
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.024
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.201
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.154
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.227
CY2019Q4	ori	Deferred Tax Assets Tax Losses Claims And Settlement Expenses DeferredTaxAssetsTaxLossesClaimsAndSettlementExpenses	195200000	USD
CY2018Q4	ori	Deferred Tax Assets Tax Losses Claims And Settlement Expenses DeferredTaxAssetsTaxLossesClaimsAndSettlementExpenses	189800000	USD
CY2017Q4	ori	Deferred Tax Assets Tax Losses Claims And Settlement Expenses DeferredTaxAssetsTaxLossesClaimsAndSettlementExpenses	159200000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	48300000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	47800000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	49100000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	200000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	13800000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	15800000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	17900000	USD
CY2019Q4	ori	Alternative Minimum Tax Amt Credit Carry Forward AlternativeMinimumTaxAmtCreditCarryForward	9000000.0	USD
CY2018Q4	ori	Alternative Minimum Tax Amt Credit Carry Forward AlternativeMinimumTaxAmtCreditCarryForward	9000000.0	USD
CY2017Q4	ori	Alternative Minimum Tax Amt Credit Carry Forward AlternativeMinimumTaxAmtCreditCarryForward	9600000	USD
CY2019Q4	ori	Deferred Tax Asset Operating Lease Rightof Use Asset DeferredTaxAssetOperatingLeaseRightofUseAsset	49900000	USD
CY2018Q4	ori	Deferred Tax Asset Operating Lease Rightof Use Asset DeferredTaxAssetOperatingLeaseRightofUseAsset	0	USD
CY2017Q4	ori	Deferred Tax Asset Operating Lease Rightof Use Asset DeferredTaxAssetOperatingLeaseRightofUseAsset	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	15000000.0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	59500000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	18000000.0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	18200000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	331400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	280800000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	254500000	USD
CY2019Q4	ori	Deferred Tax Liabilties Unearned Premiums DeferredTaxLiabiltiesUnearnedPremiums	34500000	USD
CY2018Q4	ori	Deferred Tax Liabilties Unearned Premiums DeferredTaxLiabiltiesUnearnedPremiums	33400000	USD
CY2017Q4	ori	Deferred Tax Liabilties Unearned Premiums DeferredTaxLiabiltiesUnearnedPremiums	30500000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	63700000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	62600000	USD
CY2019Q4	ori	Deferred Tax Liabilities Mortgage Guaranty Insurers Contingency Reserve DeferredTaxLiabilitiesMortgageGuarantyInsurersContingencyReserve	0	USD
CY2018Q4	ori	Deferred Tax Liabilities Mortgage Guaranty Insurers Contingency Reserve DeferredTaxLiabilitiesMortgageGuarantyInsurersContingencyReserve	86500000	USD
CY2017Q4	ori	Deferred Tax Liabilities Mortgage Guaranty Insurers Contingency Reserve DeferredTaxLiabilitiesMortgageGuarantyInsurersContingencyReserve	77900000	USD
CY2019Q4	ori	Deferred Tax Liabilities Fixed Maturity Securities Adjusted To Cost DeferredTaxLiabilitiesFixedMaturitySecuritiesAdjustedToCost	3400000	USD
CY2018Q4	ori	Deferred Tax Liabilities Fixed Maturity Securities Adjusted To Cost DeferredTaxLiabilitiesFixedMaturitySecuritiesAdjustedToCost	2600000	USD
CY2017Q4	ori	Deferred Tax Liabilities Fixed Maturity Securities Adjusted To Cost DeferredTaxLiabilitiesFixedMaturitySecuritiesAdjustedToCost	3000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	257800000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	57400000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	164200000	USD
CY2019Q4	ori	Deferred Tax Liabilities Title Plants And Records DeferredTaxLiabilitiesTitlePlantsAndRecords	2900000	USD
CY2018Q4	ori	Deferred Tax Liabilities Title Plants And Records DeferredTaxLiabilitiesTitlePlantsAndRecords	2900000	USD
CY2017Q4	ori	Deferred Tax Liabilities Title Plants And Records DeferredTaxLiabilitiesTitlePlantsAndRecords	2900000	USD
CY2019Q4	ori	Deferredtax Liabilities Tcja Discountedreservestransitionadjustment DeferredtaxLiabilitiesTCJADiscountedreservestransitionadjustment	19500000	USD
CY2018Q4	ori	Deferredtax Liabilities Tcja Discountedreservestransitionadjustment DeferredtaxLiabilitiesTCJADiscountedreservestransitionadjustment	32000000.0	USD
CY2017Q4	ori	Deferredtax Liabilities Tcja Discountedreservestransitionadjustment DeferredtaxLiabilitiesTCJADiscountedreservestransitionadjustment	0	USD
CY2019Q4	ori	Deferred Tax Liability Operating Lease Liability DeferredTaxLiabilityOperatingLeaseLiability	46800000	USD
CY2018Q4	ori	Deferred Tax Liability Operating Lease Liability DeferredTaxLiabilityOperatingLeaseLiability	0	USD
CY2017Q4	ori	Deferred Tax Liability Operating Lease Liability DeferredTaxLiabilityOperatingLeaseLiability	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	14700000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13400000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	16900000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	443500000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	291000000.0	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	355100000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	112200000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10300000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	100500000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	65800000	USD
CY2019Q4	ori	Alternative Minimum Tax Amt Credit Carry Forward AlternativeMinimumTaxAmtCreditCarryForward	9000000.0	USD
CY2019	ori	Increase Decreasein Contingency Reserve IncreaseDecreaseinContingencyReserve	412200000	USD
CY2019Q4	ori	Us Treasury Taxand Loss Bonds Redeemed USTreasuryTaxandLossBondsRedeemed	138500000	USD
CY2019	us-gaap	Depreciation Depreciation	26800000	USD
CY2018	us-gaap	Depreciation Depreciation	27600000	USD
CY2017	us-gaap	Depreciation Depreciation	27200000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	160700000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	13200000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	174000000.0	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1100000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	175100000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301016076	shares
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	10800000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	370500000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	560500000	USD
CY2019	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	471100000	USD
CY2019Q4	ori	Defined Benefit Plan Securitiesat Net Asset Value DefinedBenefitPlanSecuritiesatNetAssetValue	21600000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	409900000	USD
CY2018Q4	ori	Defined Benefit Plan Securitiesat Net Asset Value DefinedBenefitPlanSecuritiesatNetAssetValue	20300000	USD
CY2015Q3	ori	Stockacquiredduringperiodvalueemployeestockownershipplan Stockacquiredduringperiodvalueemployeestockownershipplan	34000000.0	USD
CY2018	ori	Stockacquiredduringperiodvalueemployeestockownershipplan Stockacquiredduringperiodvalueemployeestockownershipplan	50000000.0	USD
CY2019Q4	ori	Employee Savings And Stock Ownership Plan Number Of Allocated Shares EmployeeSavingsAndStockOwnershipPlanNumberOfAllocatedShares	15378368	shares
CY2019Q4	ori	Employee Savings And Stock Ownership Plan Number Of Allocated Shares To Employees EmployeeSavingsAndStockOwnershipPlanNumberOfAllocatedSharesToEmployees	11417966	shares
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1056400000	USD
CY2018	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3100000	USD
CY2017	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	14000000.0	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
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	574500000	USD
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
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	262114533	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
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1589286	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
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	35683554	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301227715	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	299387373	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.52
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.14
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.51
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.92
CY2019	ori	Maximum Numberof Common Stock Shares Available Under2016 Stock Option Plan MaximumNumberofCommonStockSharesAvailableUnder2016StockOptionPlan	15000000.0	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	8800000	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
CY2019Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Within One Year Of Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateWithinOneYearOfGrantDate	0.10
CY2019Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year One And Year Two Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearOneAndYearTwoGrantDate	0.15
CY2019Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Two And Year Three Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearTwoAndYearThreeGrantDate	0.20
CY2019Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Three And Year Four Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearThreeAndYearFourGrantDate	0.25
CY2019Q4	ori	Sharebased Compensation Arrangement By Share Based Payment Award Vesting Rate Between Year Four And Year Five Grant Date SharebasedCompensationArrangementByShareBasedPaymentAwardVestingRateBetweenYearFourAndYearFiveGrantDate	0.30
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3700000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3800000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3500000	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
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1200000	USD
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.22
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0397
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
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0229
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
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8243025	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.77
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
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	12000000.0	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	11300000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16900000	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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10500000	USD
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.98
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1403500	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	19.98
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
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1337881	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.65
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	1743625	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	21.60
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
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
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4228259	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.42
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.81
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
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
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	3200000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y
CY2018Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	977900000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	8600000	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
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	3600000	USD
CY2019Q4	ori	Numberof Jurisdictions NumberofJurisdictions	16	jurisdiction
CY2019Q4	ori	Mortgage Guaranty Insurers Contingency Reserves MortgageGuarantyInsurersContingencyReserves	352500000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	974000000.0	USD
CY2019Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	1050000000.0	USD
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	981400000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	42900000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	33500000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	24400000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	100900000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	311600000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	73600000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	21700000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	950000000.0	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	43200000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	47200000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	64500000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	75000000	shares
CY2019Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	611600000	USD
CY2019Q4	us-gaap	Dividends Receivable DividendsReceivable	399500000	USD
CY2018Q4	us-gaap	Dividends Receivable DividendsReceivable	412300000	USD
CY2017Q4	us-gaap	Dividends Receivable DividendsReceivable	367300000	USD
CY2019	ori	Special Dividend Per Share Paid SpecialDividendPerSharePaid	1.00
CY2018	ori	Special Dividend Per Share Paid SpecialDividendPerSharePaid	1.00
CY2018	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2018-01-31
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0546
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y10M24D
CY2019	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	73000000.0	USD
CY2018	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	69000000.0	USD
CY2017	ori	Rentalexpenseforleasedpremises Rentalexpenseforleasedpremises	65200000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	64900000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	59000000.0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	50600000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	238000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	60400000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	48900000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	39500000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	32700000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	24000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	103600000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	309400000	USD
CY2019Q1	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1388500000	USD
CY2019Q2	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1494700000	USD
CY2019Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1594600000	USD
CY2019Q4	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1649000000.0	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	1868600000	USD
CY2019Q2	us-gaap	Revenues Revenues	1644700000	USD
CY2019Q3	us-gaap	Revenues Revenues	1771000000.0	USD
CY2019Q4	us-gaap	Revenues Revenues	1929300000	USD
CY2019Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1350100000	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1439200000	USD
CY2019Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1518600000	USD
CY2019Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1583200000	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
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
CY2018Q1	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1361000000.0	USD
CY2018Q2	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1450400000	USD
CY2018Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1535200000	USD
CY2018Q4	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1478800000	USD
CY2018Q1	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	-30600000	USD
CY2018Q2	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	180200000	USD
CY2018Q3	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	244500000	USD
CY2018Q4	ori	Net Investment Income And Realized Gains Losses NetInvestmentIncomeAndRealizedGainsLosses	-197900000	USD
CY2018Q1	us-gaap	Revenues Revenues	1330400000	USD
CY2018Q2	us-gaap	Revenues Revenues	1630700000	USD
CY2018Q3	us-gaap	Revenues Revenues	1779700000	USD
CY2018Q4	us-gaap	Revenues Revenues	1280900000	USD
CY2018Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1336400000	USD
CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1384000000.0	USD
CY2018Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1444600000	USD
CY2018Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1418500000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	4000000.0	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	197700000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	275200000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-106500000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.36
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.36
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	278116902	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299738944	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299006345	shares
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	299080914	shares
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	279528034	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301075469	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	300374004	shares
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	299080914	shares
CY2019Q4	ori	Number Of Major Segments NumberOfMajorSegments	3	segment
CY2019	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.10
CY2019	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	36600000	USD
CY2018	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	58200000	USD
CY2017	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	211600000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2017	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	0	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	636100000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-235600000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	211600000	USD
CY2019	us-gaap	Revenues Revenues	7213700000	USD
CY2018	us-gaap	Revenues Revenues	6021800000	USD
CY2017	us-gaap	Revenues Revenues	6263100000	USD
CY2019	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	36600000	USD
CY2018	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	58200000	USD
CY2017	ori	Realized Investment Gains Losses From Sales RealizedInvestmentGainsLossesFromSales	211600000	USD
CY2019	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	599500000	USD
CY2018	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	-293800000	USD
CY2017	ori	Unrealizedfromchangesinfairvalueofequitysecurities Unrealizedfromchangesinfairvalueofequitysecurities	0	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	636100000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-235600000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	211600000	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
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	725400000	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
CY2017	ori	Income Taxes Credits On Realized Investment Gains Losses IncomeTaxesCreditsOnRealizedInvestmentGainsLosses	-30800000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	265900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	67500000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	164800000	USD
CY2019Q4	us-gaap	Assets Assets	21076300000	USD
CY2018Q4	us-gaap	Assets Assets	19327100000	USD
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	9021700000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	9280900000	USD
CY2019Q4	us-gaap	Investment Owned At Cost InvestmentOwnedAtCost	13158700000	USD
CY2019Q4	us-gaap	Investments Investments	14359200000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1056400000	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	5498300000	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	5253400000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	297800000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	9237600000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	1971500000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Other Policy Claims And Benefits Payable SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable	204700000	USD
CY2017	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	5080200000	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	2786300000	USD
CY2019	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	5533200000	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	2633200000	USD
CY2018	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	5354700000	USD
CY2017	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	409400000	USD
CY2017	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	2478800000	USD
CY2017	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	454000000.0	USD
CY2017	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	2604700000	USD
CY2017	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	5210100000	USD
CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	6936700000	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	5498300000	USD
CY2019	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.010
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	6528400000	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	5253400000	USD
CY2018	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.010
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	6296600000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1264500000	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	48100000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	5080200000	USD
CY2017	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.009

Files In Submission

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report.css	Edgar Link	pending
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$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori

2018 Q4 Form 10-K Financial Statement

#000007426020000024 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ORI OLD REPUBLIC INTERNATIONAL CORP Stock $ori

2018 Q4 Form 10-K Financial Statement

#000007426020000024 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ORI
OLD REPUBLIC INTERNATIONAL CORP Stock $ori