Change in proceeds of sales of investments available for sale receivable in period Noncash Investing and Financing Activities, Change in Proceeds of Sales of Investments Noncash Investing and Financing Activities, Change in Proceeds of Sales of Investments LTV 60 to 75 Percent LTV 60 to 75 Percent [Member] Loan-to-value (LTV) ratio from 60 to 75%. Municipals US States and Political Subdivisions Debt Securities [Member] Liabilities, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Debt-to-Value [Domain] Debt-to-Value [Domain] Related Party [Axis] Related Party [Axis] Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Revenue Recognition, Other Revenue Recognition, Other, Policy [Policy Text Block] Revenue Recognition, Other, Policy Mortality multiplier Fair Value Inputs Mortality Multiplier Fair Value Inputs Mortality Multiplier Greater than 1.25 Greater Than One Point Two Five [Member] Greater Than One Point Two Five [Member] Summary of Unfunded Commitments Other Commitments [Table Text Block] F&G acquisition Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Acquisition Addition Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Acquisition Addition Statistical Measurement [Domain] Statistical Measurement [Domain] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Premiums and other considerations: Premiums Earned, Net [Abstract] (Gain) loss on sales of investments and other assets and asset impairments, net Gain (Loss) on Investments and Disposition of Other Assets Gain (Loss) on Investments and Disposition of Other Assets Subsidiary dividends declared to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Ovation Fin. Holdings 2 LLC, Ovation Fund Mgmt. II, LLC, Banc of California, N.A. v. Chicago Title Ins. Co., and plaintiffs Ovation Fin. Holdings 2 LLC, Ovation Fund Mgmt. II, LLC, Banc of California, N.A. v. Chicago Title Ins. Co., and plaintiffs [Member] Ovation Fin. Holdings 2 LLC, Ovation Fund Mgmt. II, LLC, Banc of California, N.A. v. Chicago Title Ins. Co., and plaintiffs Personnel costs Labor and Related Expense Preferred securities Preferred Stock [Member] Black Scholes model Black Scholes Model [Member] Black Scholes Model [Member] Security Exchange Name Security Exchange Name Reinsurance Disclosures [Abstract] Reinsurance Disclosures [Abstract] Scottish Re Scottish Re [Member] Scottish Re [Member] Commercial Mortgage Loans Commercial Mortgage Loans [Member] Commercial Mortgage Loans Financing Receivable Credit Quality Indicator Current Year Abstract [Abstract] Financing Receivable Credit Quality Indicator Current Year Abstract [Abstract] Financing Receivable Credit Quality Indicator Current Year Abstract Kubera Reassurance Company Kubera Reassurance Company [Member] Kubera Reassurance Company [Member] [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] ASSETS Assets [Abstract] Investment, Name [Axis] Investment, Name [Axis] Operating lease payments Operating Lease, Payments Commercial mortgage loans, percentage of investments Commercial Mortgage Loans, Percentage of Investments Commercial Mortgage Loans, Percentage of Investments Adjustment for net unrealized investment (gains) losses Deferred Policy Acquisition Costs and Present Value of Future Profits, Unrealized Investment Gain (Loss) Deferred Policy Acquisition Costs and Present Value of Future Profits, Unrealized Investment Gain (Loss) East South Central East South Central [Member] East South Central [Member] Debt securities Debt Securities, Available-for-sale, Measurement Input 2024 Present Value of Future Insurance Profits, Expected Amortization, Year Three Treasury stock repurchased (in shares) Treasury Stock, Shares, Acquired Secured trust deposits Contract With Customer, Liability, Customer Deposits Contract With Customer, Liability, Customer Deposits Market value of option Fair Value Inputs Market Value Of Option Fair value inputs market value of option. Forward purchase agreement, measurement input Forward Purchase Agreement, Measurement Input Forward Purchase Agreement, Measurement Input Assets and Liabilities Carrying at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Other intangible assets, net Intangible Assets, Net (Excluding Goodwill and Title Plants) Intangible Assets, Net (Excluding Goodwill and Title Plants) Benefits and other changes in policy reserves Policyholder Benefits and Claims Incurred, Net, Life and Annuity Preferred stock, $0.0001 par value; authorized 50,000,000 shares; issued and outstanding, none Preferred Stock, Value, Issued Residential Portfolio Segment Residential Portfolio Segment [Member] Net earnings (loss) per share from continuing operations attributable to common shareholders (in usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Agency title insurance premiums Insurance Contracts, Agency Title Insurance Premiums [Member] Insurance Contracts, Agency Title Insurance Premiums [Member] Other comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Other Other Products And Services [Member] Other Products And Services [Member] Collateral posted Collateral Derivative Asset, Collateral, Obligation to Return Cash, Offset Net earnings (loss) from continuing operations Net earnings (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest West South Central West South Central US [Member] West South Central US [Member] Alight Alight [Member] Alight Title plants Intangible Assets, Title Plants Intangible Assets, Title Plants Due after five years through ten years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Statement [Line Items] Statement [Line Items] Class of Stock [Domain] Class of Stock [Domain] Amortization Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization Measurement Input Type [Domain] Measurement Input Type [Domain] Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Net proceeds from (purchases of) sales and maturities of short-term investment securities Payments for (Proceeds from) Short-term Investments Yield Fair Value Input, Yield Fair Value Input, Yield Weighted Average Weighted Average [Member] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Entity Small Business Entity Small Business Industrial - General Industrial, General [Member] Industrial, General [Member] DSC ratio, amortization period Debt Service Coverage Ratio, Amortization Period Debt Service Coverage Ratio, Amortization Period Contractholder funds Contract Holder Funds [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Amendment Flag Amendment Flag Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Balance at Beginning of Period Balance at End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Subsidiary dividends paid to non-controlling interest shareholders Payments of Ordinary Dividends, Noncontrolling Interest Deferred sales inducements Deferred Sales Inducements, Paid Deferred Sales Inducements, Paid Interest and investment income, including recognized gains and losses Net Investment Income, And Gain (Loss) On Investments Net Investment Income, And Gain (Loss) On Investments Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Financial Instruments [Domain] Financial Instruments [Domain] Maximum loss exposure, amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus, Balance Change in fair value of reinsurance related embedded derivatives Derivative, Gain (Loss) on Derivative, Net Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fair Value, 12 Months or longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Increase (decrease) in statutory capital surplus Statutory Accounting Practices, Statutory Capital and Surplus, Increase (Decrease) as a Result of ReDomestication by Entity Statutory Accounting Practices, Statutory Capital and Surplus, Increase (Decrease) as a Result of ReDomestication by Entity Deferred sales inducement, unrealized investment gain Deferred Sales Inducement Cost, Unrealized Gain (Loss) on Investment EBITDA Multiple EBITDA Multiple [Member] EBITDA Multiple Schedule of Sources of Net Investment Income Reported Schedule of Sources of Net Investment Income Reported [Table Text Block] Schedule of Sources of Net Investment Income Reported For securities intended/required to be sold prior to recovery of amortized cost basis Debt Securities, Available-for-sale, Allowance for Credit Loss, Sell before Recovery Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Pacific Pacific US [Member] Pacific US [Member] 2019 2018 Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year Dividend Yield Measurement Input, Expected Dividend Rate [Member] Income Statement Location [Domain] Income Statement Location [Domain] Stock-based compensation APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Futures contracts Future [Member] Other Commitments [Line Items] Other Commitments [Line Items] Summary of Reserve for Title Claim Losses F&G Insurance Subsidiary Financial Information and Regulatory Matters Insurance Disclosure [Text Block] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Credit linked note Bank Loan Obligations [Member] Net increase in reserve for title claim losses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Total financial liabilities at fair value Financial Liabilities Fair Value Disclosure Total assets Assets Assets Foreign Governments Debt Security, Government, Non-US [Member] Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman [Member] Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Provision for title claim losses Policyholder Benefits and Claims Incurred, Net, Other Subsequent Event Type [Axis] Subsequent Event Type [Axis] Total Deferred Policy Acquisition Costs and Present Value of Future Profits [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Change in statutory capital surplus Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Strike Price Measurement Input, Share Price [Member] FIA embedded derivative FIA Embedded Derivatives [Member] FIA embedded derivatives Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial mortgage-backed securities Commercial mortgage loans Commercial Mortgage Backed Securities [Member] Total liabilities Liabilities Escrow fees Escrow Fees [Member] Escrow Fees [Member] Loan subservicing revenue Fees and Commissions, Mortgage Banking and Servicing Plaintiffs claim losses amount Loss Contingency, Damages Sought, Value Total Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Liabilities Related to Investment Contracts, Fair Value Disclosure Liabilities Related to Investment Contracts, Fair Value Disclosure DSI DSI [Member] DSI Fair Values, Less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Future policy benefits Liability for Future Policy Benefit, before Reinsurance Net change in other assets and other liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Additional Paid-in Capital Additional Paid-in Capital [Member] Change in funds withheld from reinsurers Increase (Decrease) in Reinsurance Payables Asset Class [Axis] Asset Class [Axis] Beginning balance (in shares) Ending balance (in shares) Shares, Issued Net earnings (loss) per share from continuing operations attributable to common shareholders (in usd per share) Income (Loss) from Continuing Operations, Per Basic Share Total number of available-for-sale securities in an unrealized loss position twelve months or longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Investments in unconsolidated affiliates Carrying value Equity Method Investments Derivative investments Derivative Instruments [Member] Derivative Instruments [Member] Broker-quoted Valuation, Market Approach [Member] Real estate technology Real Estate Technology [Member] Real Estate Technology [Member] Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Acquisitions/disposals of businesses, net of cash acquired/disposed Payments to Acquire Businesses, Net of Cash Acquired Common stock, shares authorized (in shares) Common Stock, Shares Authorized Percentage of outstanding equity acquired Business Acquisition, Percentage of Voting Interests Acquired Exercise of stock options Proceeds from Stock Options Exercised Credit Suisse Credit Suisse [Member] Credit Suisse Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Barclay's Bank Barclays Bank [Member] Barclay's Bank. Income Statement [Abstract] Income Statement [Abstract] Accumulated Other Comprehensive Earnings (Loss) AOCI Attributable to Parent [Member] Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Accrued interest receivable Interest Receivable Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Liabilities, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Tax deferred property exchange income Tax Deferred Property Exchange [Member] Tax Deferred Property Exchange Debt Security Category [Axis] Debt Security Category [Axis] Subscription Agreements with Alight Holdings, Inc. and Foley Trasimene Acquisition Corp. Subscription Agreements with Alight Holdings, Inc. and Foley Trasimene Acquisition Corp. [Member] Subscription Agreements with Alight Holdings, Inc. and Foley Trasimene Acquisition Corp. Scenario [Domain] Scenario [Domain] Life Insurance Premiums, Insurance and Investment Product Fees, Other Life Insurance Premiums, Insurance and Investment Product Fees, Other [Member] Life Insurance Premiums, Insurance and Investment Product Fees, Other Counterparty Name [Domain] Counterparty Name [Domain] Consolidation Items [Domain] Consolidation Items [Domain] Greater than 1.00 Greater Than One Point Zero Zero [Member] Greater Than One Point Zero Zero Tax benefit related to 2017 amended return Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Greater than 1.00 but less than 1.25 Greater Than One But Less Than One Point Two Five [Member] Greater Than One But Less Than One Point Two Five [Member] Value of Business Acquired, Deferred Acquisition Costs and Deferred Sales Inducements Goodwill and Intangible Assets Disclosure [Text Block] Change in treasury stock purchases payable in period Noncash Investing and Financing Activities, Change in Treasury Stock Purchases Payable Noncash Investing and Financing Activities, Change in Treasury Stock Purchases Payable Available for sale securities, allowance for credit losses Allowance for Expected Credit Losses Balance at Beginning of Period Balance at End of Period Debt Securities, Available-for-sale, Allowance for Credit Loss Total Gross Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Equity in earnings of unconsolidated affiliates Equity in earnings (loss) of unconsolidated affiliates Income (Loss) from Equity Method Investments Earnings (loss) from continuing operations before income taxes and equity in earnings of unconsolidated affiliates Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of unconsolidated affiliates Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Hedging Designation [Axis] Hedging Designation [Axis] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Securities, at fair value Equity securities Equity Securities, FV-NI Entity [Domain] Entity [Domain] Thereafter Present Value Of Future Insurance Profits Amortization Expense After Four Years Present Value Of Future Insurance Profits Amortization Expense After Four Years Option cost Fair Value Input Option Cost Fair Value Input Option Cost Earnings (loss) before equity in earnings of unconsolidated affiliates Income (Loss) From Continuing Operations Before Minority Interest And Income (Loss) On Equity Method Investments, Net Of Income Tax Income (Loss) From Continuing Operations Before Minority Interest And Income (Loss) On Equity Method Investments, Net Of Income Tax Performing Performing Financial Instruments [Member] Proceeds from Sale of Fixed Maturity Available-for-sale Securities Debt Securities, Available-for-sale [Table Text Block] Less: Comprehensive earnings (loss) attributable to non-controlling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. [Member] Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. Insurance Subsidiary Affiliated Entity [Member] Allowance % of Total Loans and Leases Receivable, Allowance, Mortgage Loans, Percentage of Total Loans and Leases Receivable, Allowance, Mortgage Loans, Percentage of Total Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Fixed maturity securities, available for sale Fair Value/ Carrying Value Debt Securities, Available-for-sale Residential mortgage-backed securities Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Derivative, strike price Derivative, Price Risk Option Strike Price Over 90 days past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Change in Fair Value of Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Traditional Life Insurance Premiums Life Insurance Product Line [Member] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Assets, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Deferred policy acquisition costs and deferred sales inducements Increase (Decrease) in Deferred Policy Acquisition Costs and Deferred Sales Inducements Increase (Decrease) in Deferred Policy Acquisition Costs and Deferred Sales Inducements Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Earnings per share Net Income Loss Per Common Share Attributable To Controlling Interest [Abstract] Net income (loss) per common share attributable to controlling interest. Additional paid-in capital Additional Paid in Capital, Common Stock Entity Registrant Name Entity Registrant Name Subsequent Event Type [Domain] Subsequent Event Type [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Assets Assets, Fair Value Disclosure [Abstract] Claims paid, net of recoupments related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Offered quotes Fair Value Inputs Quoted Prices Fair Value Inputs Quoted Prices Due in one year or less, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Dividends paid Payments of Ordinary Dividends, Common Stock Gross gains Gain on Sale of Investments Equity securities Equity securities Equity Securities [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Investments: Investments [Abstract] Real Estate [Domain] Real Estate [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Other invested assets Other Invested Assets [Member] Other Invested Assets [Member] Truist Truist [Member] Truist Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 2023 Present Value of Future Insurance Profits, Expected Amortization, Year Two Entity Address, Postal Zip Code Entity Address, Postal Zip Code Net amount recoverable Gain on Business Interruption Insurance Recovery Residential mortgage loans, location percentage Residential Mortgage Loans, Location Percentage Residential Mortgage Loans, Location Percentage Goodwill Goodwill Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Consolidated Investments Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Schedule of Unobservable Inputs Used for Level Three Fair Value Measurements of Financial Instruments on Recurring Basis Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Pavonia Life Insurance Company Pavonia Life Insurance Company [Member] Pavonia Life Insurance Company [Member] Net realized gains on fixed maturity available-for-sale securities Debt Securities, Realized Gain (Loss) Net change in income taxes Increase (Decrease) in Income Taxes Payable Investment expense Investment Income, Investment Expense Other Other Property [Member] Cash dividend per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Equity Securities, FV-NI, Realized Gain (Loss) Equity Securities, FV-NI, Realized Gain (Loss) Asset Class [Domain] Asset Class [Domain] Financing Receivable, Nonaccrual Financing Receivable, Nonaccrual [Table Text Block] Equity [Abstract] Equity [Abstract] Total financial assets at fair value Assets, fair value Assets, Fair Value Disclosure Yuan Yu and Polly Yu v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Yuan Yu and Polly Yu v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman [Member] Yuan Yu and Polly Yu v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Estimated Amortization Expense for VOBA in Future Fiscal Periods Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Derivative Contract [Domain] Derivative Contract [Domain] Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Liabilities, Net transfer In (Out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net FIA embedded derivatives, included in contractholder funds Fixed indexed annuities Fixed Index Annuity [Member] Fixed index annuity. Subscription agreement, stock purchase, share price (in usd per share) Subscription Agreement, Commitment to Purchase, Shares, Share Price Subscription Agreement, Commitment to Purchase, Shares, Share Price Limited partnerships Limited Partnership [Member] Limited Partnership [Member] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Credit Linked Note Credit Linked Note [Member] Credit Linked Note [Member] Net Policyholder Benefits and Claims Incurred, Net Counterparty Name [Axis] Counterparty Name [Axis] FNF common stock, $0.0001 par value; authorized 600,000,000 shares as of March 31, 2021 and December 31, 2020; outstanding of 289,328,879 and 291,448,627 as of March 31, 2021 and December 31, 2020, respectively, and issued of 323,303,805 and 322,622,948 as of March 31, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Document Fiscal Year Focus Document Fiscal Year Focus Other long-term investments Other Long-term Investments Change in insurance recoverable Change in insurance recoverable Increase (Decrease) in Reinsurance Recoverable Entity Current Reporting Status Entity Current Reporting Status Available-for-sale Securities Available-for-sale Securities [Member] Liabilities, Total Gains (Losses) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Derivatives: Derivative Asset [Abstract] Mountain Mountain [Member] Mountain [Member] Debt-to-Value [Axis] Debt-to-Value [Axis] Purchases of investment securities Payments to Acquire Debt Securities, Available-for-sale Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Term of contract, term two Derivative, Term of Contract, Term Two Derivative, Term of Contract, Term Two Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Charges assessed to contractholders for mortality and admin Charges Assessed To Contract Holders For Mortality And Administration Mortality and expense charges and administrative fees. Funds withheld co-insurance basis, percentage Funds Withheld Co-Insurance Basis, Percentage Funds Withheld Co-Insurance Basis, Percentage Common stock, shares, issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents, at March 31, 2021 and December 31, 2020 includes $283 and $270, respectively, of pledged cash related to secured trust deposits Cash and Cash Equivalents, at Carrying Value Benefits and Other Changes in Insurance Policy Reserves: Policyholder Benefits and Claims Incurred [Abstract] Limited Partnerships Limited Partnerships [Member] Limited Partnerships Lease liabilities Operating Lease, Liability Trade receivables Accounts Receivable, after Allowance for Credit Loss Segment Reporting [Abstract] Total Fidelity National Financial, Inc. shareholders’ equity Stockholders' Equity Attributable to Parent Consideration transferred Business Combination, Consideration Transferred Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Deferrals Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Addition Entity Address, City or Town Entity Address, City or Town Change in allowance for expected credit losses Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Company-owned life insurance Bank Owned Life Insurance Other assets Other Assets [Member] Financial Instrument [Axis] Financial Instrument [Axis] Structured hybrids Structured Hybrids [Member] Structured hybrids. Commercial mortgage loans Investments, Commercial Mortgage Loans, Fair Value Disclosure Fair value of the investment commercial mortgage loan portfolio Realized losses on other invested assets Gain (Loss) on Sale of Other Investments Liabilities: Liabilities [Abstract] Assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets Ceded Credit Risk [Table] Ceded Credit Risk [Table] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Provision for title insurance claim losses as a percentage of title insurance premiums Provision For Title Insurance Claims on Current Year Policies Provision For Title Insurance Claims on Current Year Policies Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman [Member] Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Available-for-sale securities Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] Unrealized gain on investments in unconsolidated affiliates Other comprehensive earnings — unrealized gain on investments in unconsolidated affiliates Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) On Equity Method Investments Arising During Period, Net Of Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) On Equity Method Investments Arising During Period, Net Of Tax Investment, Name [Domain] Investment, Name [Domain] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Embedded Derivatives Included In Contractholder Funds Embedded Derivatives Included In Contractholder Funds [Member] Embedded derivatives, included in contractholder funds. Reclassification adjustments for change in unrealized gains and losses included in net earnings, tax expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Due after ten years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Due after one year through five years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Effects of Reinsurance [Table] Effects of Reinsurance [Table] Corporate and Other Corporate and Other [Member] Gross investment income Gross Investment Income, Operating DH Claims LLC v. Chicago Title Co., Chicago Title Ins. Co., and Della Ducharme DH Claims LLC v. Chicago Title Co., Chicago Title Ins. Co., and Della Ducharme [Member] DH Claims LLC v. Chicago Title Co., Chicago Title Ins. Co., and Della Ducharme Unlocking Deferred Policy Acquisition Costs and Present Value of Future Profits, Unlocking Adjustment Deferred Policy Acquisition Costs and Present Value of Future Profits, Unlocking Adjustment Fair Value Measured at Net Asset Value Fair Value Measured at Net Asset Value Per Share [Member] For securities sold during the period Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold 2017 2016 Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year Equity: Stockholders' Equity Attributable to Parent [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Equity Method Investment, Nonconsolidated Investee or Group of Investees Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Non-performance spread Fair Value Inputs Non Performance Spread Fair Value Inputs Non Performance Spread Other long-term investments Other Long-term Investments [Member] Entity Filer Category Entity Filer Category Common Stock Equity securities Common Stock [Member] Wilton Reassurance Company Wilton Reassurance Company [Member] Wilton reassurance company. Product and Service [Domain] Product and Service [Domain] Distributions from unconsolidated affiliates, return of investment Proceeds from Equity Method Investment, Distribution, Return of Capital Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Other Commitments [Axis] Other Commitments [Axis] Revenue Recognition, Services, Real Estate Transactions Revenue Recognition, Services, Real Estate Real Estate Transactions [Policy Text Block] Revenue Recognition, Services, Real Estate Real Estate Transactions Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Commitment to Invest Commitment to Invest [Member] Commitment to Invest [Member] Total Total Financing Receivable, before Allowance for Credit Loss Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Diluted Earnings Per Share, Diluted [Abstract] Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Third-Party Valuation Third Party Valuation Technique [Member] Third Party Valuation Technique [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Acquisitions Business Combination Disclosure [Text Block] Direct Policyholder Benefits and Claims Incurred, Direct Fixed maturity securities available-for-sale: Debt Securities, Available-for-sale [Abstract] Expenses: Costs and Expenses [Abstract] Write-offs charged against the allowance Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff Total number of available-for-sale securities in an unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Unrealized loss on foreign currency translation Other comprehensive earnings - unrealized loss on foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Treasury stock (in shares) Treasury Stock, Shares Cumulative adjustments for net unrealized investment gains Cumulative Adjustments For Net Unrealized Investment Gains Cumulative adjustments for net unrealized investment gains. Other derivatives and embedded derivatives Embedded derivatives Embedded Derivative Financial Instruments [Member] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Direct title insurance premiums Insurance Contracts, Direct Title Insurance Premiums [Member] Insurance Contracts, Direct Title Insurance Premiums [Member] Total equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total revenues Revenues Class of Stock [Axis] Class of Stock [Axis] Current year Current Year Claims and Claims Adjustment Expense Income taxes Income Taxes Paid, Net Total Mortgage Loans Total Mortgage Loans [Member] Total Mortgage Loans [Member] Residential mortgage loans Residential Mortgage [Member] Liabilities, fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Net earnings (loss) per share attributable to common shareholders, diluted (in usd per share) Earnings Per Share, Diluted Subscription agreement, stock purchase, par value (in usd per share) Subscription Agreement, Commitment to Purchase, Common Stock, Par Value Subscription Agreement, Commitment to Purchase, Common Stock, Par Value CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 [Member] CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 Schedule of Investment in Mortgage Loans by Loan to Value and Debt Service Coverage Ratios Schedule of Investment in Mortgage Loans by Loan to Value and Debt Service Coverage Ratios [Table Text Block] Tabular disclosure of investments in loans separated by loan to value (LTV) and debt service coverage ratios (DSCR). Entity Address, Address Line One Entity Address, Address Line One Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Exposure to Credit Loss on Call Options Held Schedule Of Exposure To Credit Loss On Derivative Instrument Table [Table Text Block] Schedule of exposure to credit loss on derivative instrument. Realized gains on certain derivative instruments Gain (Loss) on Sale of Derivatives Total liability derivatives Derivative Liability, Fair Value, Gross Liability Swap rates Fair Value Inputs, Treasury Rates Fair Value Inputs, Treasury Rates Subscriber fee, percentage Subscriber Fee from Investee, Purchase Price, Percentage Subscriber Fee from Investee, Purchase Price, Percentage Recoveries of amounts previously written off Proceeds, Debt Securities, Available-for-sale, Previously Written Off, Recovery Ceded Policyholder Benefits and Claims Incurred, Ceded Subscription agreements, investment Subscription Agreements, Investment Commitment Subscription Agreements, Investment Commitment Maximum Maximum [Member] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Non-controlling Interest Noncontrolling Interest [Member] Recognized gains and losses, net Recognized gains and (losses), net Gain (Loss) on Investments (Additions) reductions in allowance recorded on previously impaired securities Debt Securities, Available-for-sale, Change in Present Value, Expense (Reversal) Dividends declared, per common share Dividends, Common Stock, Cash Invested cash and short-term investments Invested Cash And Short Term Investments [Member] Invested cash and short-term investments. Claim loss provision related to: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Revenues from external customers Insurance Services Revenue Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Change in purchases of investments available for sale payable in period Noncash Investing and Financing Activities, Change in Purchases of Investments Noncash Investing and Financing Activities, Change in Purchases of Investments Investments [Domain] Investments [Domain] 2018 2017 Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year Total non-accrual loans Loans at Amortized Cost, Nonaccrual Loans at Amortized Cost, Nonaccrual Trading Symbol Trading Symbol Susan Heller Fenley Separate Property Trust, Susan Heller Fenley Inherited Roth IRA, Shelley Lynn Tarditi Trust and ROJ, LLC v. Chicago Title Co., Chicago Title Ins. Co. et al Susan Heller Fenley Separate Property Trust, Susan Heller Fenley Inherited Roth IRA, Shelley Lynn Tarditi Trust and ROJ, LLC v. Chicago Title Co., Chicago Title Ins. Co., [Member] Susan Heller Fenley Separate Property Trust, Susan Heller Fenley Inherited Roth IRA, Shelley Lynn Tarditi Trust and ROJ, LLC v. Chicago Title Co., Chicago Title Ins. Co., Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Summary of the Reserve for Claim Losses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Entity Shell Company Entity Shell Company Retail Retail Site [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Schedule of Residential Mortgage Loans by State Schedule of Residential Mortgage Loans by Geographic Location [Table Text Block] Schedule of Residential Mortgage Loans by Geographic Location South Atlantic South Atlantic US [Member] South Atlantic US [Member] Balance at beginning of period Balance at end of period Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net Reinsurance related embedded derivatives, included in accounts payable and accrued liabilities Reinsurance related embedded derivatives, included in accounts payable and accrued liabilities Embedded Derivatives in Reinsurance Contracts [Member] Embedded Derivatives in Reinsurance Contracts [Member] Document Type Document Type Mark Atherton, et al., v. Chicago Title Co. and Chicago Title Ins. Co. Mark Atherton, et al., v. Chicago Title Co. and Chicago Title Ins. Co. [Member] Mark Atherton, et al., v. Chicago Title Co. and Chicago Title Ins. Co. Beginning balance Ending balance of claim loss reserve for title insurance Liability for Claims and Claims Adjustment Expense Treasury Stock Treasury Stock [Member] Number of policies reinsured by foreign company not engaged in insurance Number of Policies Reinsured by Foreign Company Not Engaged in Insurance Number of Policies Reinsured by Foreign Company Not Engaged in Insurance Subscription agreements Subscription agreements Subscription Agreements [Member] Subscription Agreements Segments [Axis] Segments [Axis] Change in Unrealized Incl in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Unrealized Gain (Loss) Included in Other Comprehensive Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Unrealized Gain (Loss) Included in Other Comprehensive Income (Loss) Level 3 Fair Value, Inputs, Level 3 [Member] Randolph L. Levin, et al., v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, Betty Elixman, et al Randolph L. Levin, et al., v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, Betty Elixman, et al [Member] Randolph L. Levin, et al., v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, Betty Elixman, et al Derivative investments Derivative Asset Total fixed maturities Fixed Maturities [Member] Due after one year through five years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Assets, carried on Balance Sheet at amounts other than fair value Assets, carried on Balance Sheet at amounts other than fair value Assets, carried on Balance Sheet at amounts other than fair value Deferred tax liability Deferred Income Tax Liabilities, Net Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Total fixed maturity available-for-sale securities, Fair Value Available For Sale Securities Fair Value On Debt Maturities Available for sale securities fair value on debt maturities. 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II Information about Trade Receivables and Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Purchases of treasury stock Payments for Repurchase of Common Stock Entity Address, State or Province Entity Address, State or Province Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Other Commitments [Table] Other Commitments [Table] Retained earnings Retained Earnings (Accumulated Deficit) Lease assets Operating Lease, Right-of-Use Asset Expected credit losses on reinsurance recoverable Reinsurance Recoverable, Allowance for Credit Loss ServiceLink, excluding title premiums, escrow fees, and subservicing fees ServiceLink, Excluding Title Premiums, Escrow Fees And Subservicing Fees [Member] ServiceLink, Excluding Title Premiums, Escrow Fees And Subservicing Fees [Member] Additions to property and equipment and capitalized software Payments To Acquire Property, Plant, and Equipment and Software Payments To Acquire Property, Plant, and Equipment and Software Hotel Hotel [Member] New England New England [Member] New England [Member] Changes in Fair Value of Financial Instruments - 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Number of instruments held Derivative, Number of Instruments Held Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] Allowance for expected credit loss Loans and Leases Receivable, Allowance Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Wells Fargo Wells Fargo [Member] Wells Fargo [Member] Other investments Other Investments [Member] Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Liabilities, Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Prior years Prior Year Claims and Claims Adjustment Expense Entity Central Index Key Entity Central Index Key Related Party [Domain] Related Party [Domain] Derivative Instrument [Axis] Derivative Instrument [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Summary of Changes Intangible Assets, VOBA and DAC DSI Schedule of Finite-Lived Intangible Assets [Table Text Block] Liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities Total expenses Benefits, Losses and Expenses Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Debt Service Coverage Ratio [Axis] Debt Service Coverage Ratio [Axis] Debt Service Coverage Ratio Geographical [Axis] Geographical [Axis] Segments [Domain] Segments [Domain] Amortized Cost Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Non-performing Nonperforming Financial Instruments [Member] Assets, Total Gains (Losses) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Income Statement Location [Axis] Income Statement Location [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Remeasurement of lease liabilities Lessee, Operating Lease, Remeasurement Of Lease Liability Lessee, Operating Lease, Remeasurement Of Lease Liability Number of shares in which statutory appraisal rights have been claimed (in shares) Loss Contingency, Number Of Shares In Which Asserted Statutory Appraisal Rights Have Been Claimed Loss Contingency, Number Of Shares In Which Asserted Statutory Appraisal Rights Have Been Claimed Notional Amount Derivative, Notional Amount Contractholder account deposits Proceeds from Annuities and Investment Certificates Commercial mortgage loans, % of Total Commercial Mortgage Receivable, Percentage of Total Percentage of the total commercial loan portfolio. 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Interest credited/index credits to contractholder account balances Interest Credited to Policy Owner Account Home warranty Insurance Contracts, Home Warranty [Member] Insurance Contracts, Home Warranty [Member] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Interest Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Periodic Amortization Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Periodic Amortization All Other States All Other States [Member] All Other States [Member] Fair Value Estimate of Fair Value Measurement [Member] Short-term investments, at March 31, 2021 and December 31, 2020 includes pledged short-term investments of $1 and $1, respectively, related to secured trust deposits Other Short-term Investments Schedule of Loans with Credit Quality Indicators, Performing or Nonperforming Schedule of 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Sheet Location [Domain] Schedule of Supplemental Cash Flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Funds withheld for reinsurance liabilities Funds Held under Reinsurance Agreements, Liability West North Central West North Central US [Member] West North Central US [Member] Less: Net earnings attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Ceded Ceded Premiums Earned Asset-backed securities Asset-backed Securities [Member] Entity Interactive Data Current Entity Interactive Data Current United States UNITED STATES Revenues: Revenues [Abstract] Valuation losses Equity Securities, FV-NI, Valuation Gain (Loss) Equity Securities, FV-NI, Valuation Gain (Loss) Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Dividends Stockholders' Equity Note Disclosure [Text Block] Fair Value and Gross Unrealized Losses of Available-for-sale Securities Debt 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