Balance, beginning of year Balance, end of period Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change Total Loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Proceeds from divestiture of businesses Proceeds from Divestiture of Businesses Hotel Hotel [Member] Schedule of Proceeds from Sale of Fixed Maturity Available-for-sale Securities Debt Securities, Available-for-Sale [Table Text Block] Changes in current discount rate - future policy benefits , tax expense (benefit) OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, Tax Collateral posted Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Revenue Recognition, Other Revenue Recognition, Other, Policy [Policy Text Block] Revenue Recognition, Other, Policy Additional Paid-in Capital Additional Paid-in Capital [Member] Investments in unconsolidated affiliates Fair Value Option, Other Loans [Member] Fair Value Option, Other Loans Reclassification adjustments for change in unrealized gains and losses included in net earnings Reclassification adjustments for change in unrealized gains and losses included in net earnings Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Tabular List, Table Tabular List [Table Text Block] Ceded Ceded Product Fees Ceded Product Fees Greater than 1.25 Greater Than One Point Two Five [Member] Greater Than One Point Two Five [Member] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fixed maturity securities, available-for-sale Debt Securities [Member] 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 Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Permitted practice, statutory surplus Statutory Accounting Practices, Permitted Practice, Statutory Surplus, Amount Statutory Accounting Practices, Permitted Practice, Statutory Surplus, Amount Black Scholes model Black Scholes Model [Member] Black Scholes Model [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Revenue Recognition Revenue from Contract with Customer [Text Block] FABN Funding Agreement-Backed Note [Member] Funding Agreement-Backed Note Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Schedule of Statutory Accounting Practices Statutory Accounting Practices Disclosure [Table Text Block] Policyholder Account Balance Policyholder Account Balance [Roll Forward] Interest accrual Liability for Future Policy Benefit, Expected Net Premium, Interest Income Commercial mortgage loans Commercial Mortgage Loans [Member] Commercial Mortgage Loans Adjustment to Compensation, Amount Adjustment to Compensation Amount Range from 0001 to 0050 Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member] Embedded derivative asset Embedded Derivative Asset, Measurement Input Stock-based compensation cost Share-Based Payment Arrangement, Noncash Expense Trademarks, tradenames, and other Trademarks, Tradenames And Other [Member] Trademarks, Tradenames And Other Employee Stock Option Share-Based Payment Arrangement, Option [Member] Dividends declared, per common share Dividends, Common Stock, Cash Total Fidelity National Financial, Inc. shareholders’ equity Equity, Attributable to Parent Commercial mortgage loans, percentage of investments Commercial Mortgage Loans, Percentage of Investments Commercial Mortgage Loans, Percentage of Investments Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive earnings (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] New York New York NEW YORK East South Central East South Central [Member] East South Central [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Secured trust deposits Contract With Customer, Liability, Customer Deposits Contract With Customer, Liability, Customer Deposits Contractholder account withdrawals Repayments of Annuities and Investment Certificates LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Accrued interest receivable, included in Prepaid expenses and other assets Accrued Interest Income Receivable [Member] Accrued Interest Income Receivable Funds withheld for reinsurance receivable, at fair value Funds Held under Reinsurance Agreements, Asset Cover [Abstract] Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Effect of changes in discount rate assumptions AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax Less: Net earnings attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Definite lived Finite-Lived Intangible Assets, Net Total Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Net Benefits Incurred Policyholder Benefits and Claims Incurred, Net [Abstract] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Agency title insurance premiums Insurance Contracts, Agency Title Insurance Premiums [Member] Insurance Contracts, Agency Title Insurance Premiums [Member] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Dilution from share issuance by consolidated sub Dilution From Share Issuance By Consolidated Subsidary Dilution From Share Issuance By Consolidated Subsidary Market risk benefits asset Market risk benefits asset Market Risk Benefit Asset [Member] Market Risk Benefit Asset Loan receivable, within prepaid expenses and other assets, Aggregate unpaid principal Loan Receivable, Within Prepaid Expenses And Other Assets, Aggregate Unpaid Principal Loan Receivable, Within Prepaid Expenses And Other Assets, Aggregate Unpaid Principal Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Reinsured Reinsured [Member] Reinsured Counterparties, collateral required threshold Derivatives, Collateral, Net Exposure Threshold for Which Collateral Required Derivatives, Collateral, Net Exposure Threshold for Which Collateral Required Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Direct Direct Premiums Earned Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Increase (Decrease) In Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Increase (Decrease) In Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Increase (Decrease) In Collateral Other assets Other Assets [Member] Other loans Fair Value Option, Fixed Maturity Securities [Member] Fair Value Option, Fixed Maturity Securities Other Other Products And Services [Member] Other Products And Services [Member] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Undiscounted Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted [Abstract] Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted Entity Shell Company Entity Shell Company Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Net liability for future policy benefits, after reinsurance recoverable Liability for Future Policy Benefit, after Reinsurance West South Central West South Central US [Member] West South Central US [Member] Net increase (decrease) in reserve for title claim losses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Fair value hedging adjustments for hedged liabilities Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Title plants Intangible Assets, Title Plants Intangible Assets, Title Plants Total Other intangible assets, net Other Intangible Assets, Net Change in Unrealized Included in OCI Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Interest expense Interest expense Interest Expense, Operating Deferred Policy Acquisition Cost [Line Items] Deferred Policy Acquisition Cost [Line Items] Subsidiary repurchases of own equity Payments to Noncontrolling Interests Interest rate and foreign currency swaps, included in Accounts payable and accrued liabilities Foreign currency swaps Foreign Currency Swaps And Other Derivatives [Member] Foreign Currency Swaps And Other Derivatives Vermont VERMONT Document Fiscal Period Focus Document Fiscal Period Focus Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Schedule of Fair Value Option Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Liabilities and noncontrolling interests assumed Noncash Or Part Noncash Acquisition, Liabilities Assumed And Noncontrolling Interest Noncash Or Part Noncash Acquisition, Liabilities Assumed And Noncontrolling Interest Litigation Case [Domain] Litigation Case [Domain] Total non-accrual mortgages Financing Receivable, Excluding Accrued Interest, Nonaccrual Award Type Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Mortgage servicing rights ("MSRs") MSRs Mortgage Servicing Right [Member] Mortgage Servicing Right Direct Policyholder Benefits and Claims Incurred, Direct Industrial Industrial, General [Member] Industrial, General [Member] Net proceeds from sales and maturities of short-term investment securities Proceeds from Sale, Maturity and Collection of Short-Term Investments DSC ratio, amortization period Debt Service Coverage Ratio, Amortization Period Debt Service Coverage Ratio, Amortization Period Market risk benefits liability Market risk benefits liability Market Risk Benefit, Liability, Amount Entity Address, City or Town Entity Address, City or Town Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Statutory Accounting Practices Statutory Accounting Practices [Line Items] FHLB collateral pledged Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged Entity Emerging Growth Company Entity Emerging Growth Company Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Recognized gains (losses), net for derivatives Derivative, Gain (Loss) on Derivative, Net Liabilities, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases 75.00% to 84.99% LTV 75 to 84.99 Percent [Member] LTV 75 to 84.99 Percent Reinsurance agreement, recognized gains (losses) Reinsurance Agreement, Recognized Gains (Losses) Reinsurance Agreement, Recognized Gains (Losses) Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Deferred sales inducements Deferred Sales Inducements, Paid Deferred Sales Inducements, Paid Insurance [Abstract] Insurance [Abstract] Other long-term investments/Mortgage servicing rights ("MSRs") Other Assets, Fair Value Disclosure Failure to Purchase Interest in Contracts Failure To Purchase Interest In Contracts [Member] Failure To Purchase Interest In Contracts Value of distribution asset Value Of Distribution Asset [Member] Value Of Distribution Asset Market risk benefits liability Market risk benefits liability Market Risk Benefit Liability [Member] Market Risk Benefit Liability Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Expected future benefit payments Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance Increase in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 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 Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Income tax expense Income Tax Expense (Benefit) Pacific Pacific US [Member] Pacific US [Member] Interest credited Policyholder Account Balance, Interest Expense Balance at Beginning of Period Balance at End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Other assets Servicing Asset, Measurement Input Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Claim loss provision related to: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Immediate annuities DPL Immediate Annuity Deferred Profit Liability [Member] Immediate Annuity Deferred Profit Liability Schedule of Rollforward of Value of Business Acquired Schedule Of Value Of Business Acquired [Table Text Block] Schedule Of Value Of Business Acquired Investment, non-income producing, greater than twelve months Investment, Non-Income Producing, Greater Than Twelve Months, Fair Value Disclosure Investment, Non-Income Producing, Greater Than Twelve Months, Fair Value Disclosure Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Allowance for expected credit loss, probability of loss/default model, projected loss, using reasonable forecast period Financing Receivable, Allowance For Credit Loss, Probability of Loss, Default Model, Projected Loss, Using Reasonable And Supportable Forecast Period Financing Receivable, Allowance For Credit Loss, Probability of Loss, Default Model, Projected Loss, Using Reasonable And Supportable Forecast Period All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Call options and interest rate swaps Call Options And Interest Rate Swaps [Member] Call Options And Interest Rate Swaps Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Beginning balance at original discount rate Ending balance at original discount rate Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance Total Liabilities, Carried On Balance Sheet At Amounts Other Than Fair Value Liabilities, Carried On Balance Sheet At Amounts Other Than Fair Value FHLB Funding Agreements, Federal Home Loan Bank [Member] Funding Agreements ,Federal Home Loan Bank Less: Total Purchase price Non-cash, Acquisition, Assets Acquired Liabilities Assumed, Consideration before Liabilities And Noncontrolling Interest Non-cash, Acquisition, Assets Acquired Liabilities Assumed, Consideration before Liabilities and Noncontrolling Interest Assumed Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Jurisdiction [Axis] Statutory Accounting Practice, Jurisdiction [Axis] Lapses Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate Change in statutory capital surplus increase Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Net Product Fees, Net Product Fees, Net Fixed maturity securities available for sale, at fair value, as of March 31, 2026 and December 31, 2025, at an amortized cost of $57,703 and $57,161, respectively, net of allowance for credit losses of $91 and $112, respectively, and includes pledged fixed maturity securities of $470 and $446, respectively, related to secured trust deposits Fixed maturity securities, at fair value under fair value option Fair Value Total fixed maturity available-for-sale securities, Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Assets, Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Preferred stock, par or stated value per share (in usd per share) Preferred Stock, Par or Stated Value Per Share Customer relationships and contracts Customer Relationships And Contracts [Member] Customer Relationships And Contracts Subsequent Event Subsequent Event [Member] Deferred sales inducements DSI at beginning of period DSI at end of period Deferred Sale Inducement Cost Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Escrow fees Escrow Fees [Member] Escrow Fees [Member] Equity Components [Axis] Equity Components [Axis] Somerset Reinsurance Ltd. Somerset Reinsurance Ltd. [Member] Somerset Reinsurance Ltd. Year four Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Schedule of Balances and Changes in Market Risk Benefit Market Risk Benefit, Activity [Table Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] 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 Net amount at risk Policyholder Account Balance, Net Amount at Risk Number of reportable segment Number of Reportable Segments Contingent consideration Business Combination, Contingent Consideration, Liability, Measurement Input Provision for title claim losses Provision for title claim losses Net Policyholder Benefits and Claims Incurred, Net Entity Address, State or Province Entity Address, State or Province Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] % of Total % of Total Financing Receivable, before Allowance for Credit Loss, to Total, Percent Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Individual: Individual [Axis] Residential mortgage loans Residential Mortgage Loans [Member] Residential Mortgage Loans Dividends paid Payments of Ordinary Dividends, Common Stock Cooper v. Progress Software Corp., No. 1:23-cv-12067 Cooper v. Progress Software Corp., No. 1:23-cv-12067 [Member] Cooper v. Progress Software Corp., No. 1:23-cv-12067 Other Reinsurer, Other [Member] Corbeau Re (VT) Corbeau Re [Member] Corbeau Re Summary of Reserve for Title Claim Losses F&G Insurance Subsidiary Financial Information and Regulatory Matters Insurance Disclosure [Text Block] Issuances Policyholder Account Balance, Issuance Other securities which provide for periodic payments, Amortized Cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Maximum loss exposure, amount Maximum Loss Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Funds Withheld, Reinsurance Agreements Funds Withheld, Reinsurance Agreements [Member] Funds Withheld, Reinsurance Agreements Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Ownership percentage, of acquiree prior to acquisition Subsidiary, Ownership Percentage, Noncontrolling Owner Entity Interactive Data Current Entity Interactive Data Current Real estate technology Real Estate Technology [Member] Real Estate Technology [Member] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Total other segment items Segment Reporting, Total Other Segment Expense Items Segment Reporting, Total Other Segment Expense Items Other assets Other Asset Commitments [Member] Other Asset Commitments Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] DSI Movement in Deferred Sales Inducements [Roll Forward] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Realized gains and losses on certain derivative instruments Gain (Loss) on Sale of Derivatives Market Value of Option Measurement Input, Market Value of Option [Member] Measurement Input, Market Value of Option Fixed rate annuities Fixed Rate Annuities Fixed Annuity [Member] Loan receivable, within prepaid expenses and other assets, Fair Value Loan Receivable, Within Prepaid Expenses And Other Assets, Fair Value Loan Receivable, Within Prepaid Expenses And Other Assets, Fair Value Ownership [Domain] Ownership [Domain] Issuances and benefit payments Market Risk Benefit, Issuance And Benefit Payments Market Risk Benefit, Issuance And Benefit Payments Long-duration Contracts Assumptions [Domain] Long-duration Contracts Assumptions [Domain] Long-duration Contracts Assumptions Interest credited/index credits to contractholder account balances Increase (Decrease) Interest Credited To Policy Owner Account Increase (Decrease) Interest Credited To Policy Owner Account Year two Year two Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Entity Central Index Key Entity Central Index Key Capitalization Deferred Policy Acquisition Cost, Capitalization PEO Name PEO Name Total revenues Revenues Tax deferred property exchange income Tax Deferred Property Exchange [Member] Tax Deferred Property Exchange Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Supplemental Cash Flow Elements [Abstract] Carrying Value Investments Owned, VIE, Unconsolidated, Carrying Value Investments Owned, VIE, Unconsolidated, Carrying Value Schedule of Loans Segregated by Risk Rating Exposure Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total title claim loss provision Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Balance at Beginning of Period Balance at End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Deferred revenue (contract liabilities) Contract with Customer, Liability, Current Office Office Building [Member] Assets held by insurance regulators Assets Held by Insurance Regulators Schedule of Carrying Amount of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Life insurance premiums, insurance and investment product fees, and other Life Insurance Premiums, Insurance And Investment Product Fees, Other [Member] Life Insurance Premiums, Insurance And Investment Product Fees, Other Subsequent Event Type [Axis] Subsequent Event Type [Axis] Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of the Hedged Assets Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) 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] Partial Withdrawal Rate Measurement Input, Partial Withdrawal Rates [Member] Measurement Input, Partial Withdrawal Rates Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Debt-to-Value [Domain] Debt-to-Value [Domain] Year one Year one Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] 50.00% to 59.99% LTV 50 to 59.99 Percent [Member] LTV 50 to 59.99 Percent Total expenses Benefits, Losses and Expenses Entity Address, Address Line One Entity Address, Address Line One Schedule of Changes in Liability for Deferred Profit Liability Schedule of Changes In Liability For Deferred Profit Liability [Table Text Block] Schedule of Changes In Liability For Deferred Profit Liability Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Immediate annuities Immediate annuities Immediate Annuity [Member] Immediate Annuity Investments [Domain] Investments [Domain] Ownership [Axis] Ownership [Axis] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Earnings 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 Fair Value as of Grant Date Award Grant Date Fair Value Year five Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Current discount rate Liability for Future Policy Benefit, Current Weighted-Average Discount Rate Personnel costs Personnel costs Labor and Related Expense Schedule of Policyholder Account Balance, Guaranteed Minimum Crediting Rate Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Market Risk Benefit Market Risk Benefit [Line Items] Document Quarterly Report Document Quarterly Report Fair Value, Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Schedule of Quantitative Information Regarding Significant Unobservable Inputs Used for Recurring Level Three Fair Value Measurements of Financial Instruments Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] PRT DPL PRT Deferred Profit Liability [Member] PRT Deferred Profit Liability Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Schedule of Nonaccrual Loans by Amortized Cost Financing Receivable, Nonaccrual [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Reserves after NPR capping Reserves After NP Ratio Capping Reserves After NP Ratio Capping Investment Type [Axis] Investment Type [Axis] Total investments Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Loan receivable Loan Receivable, Commitment Advances [Member] Loan Receivable, Commitment Advances Value of business acquired VOBA at beginning of period VOBA at end of period Present Value of Future Insurance Profits, Net Balance adjusted for variances from expectation Deferred Profit Liability, Before Reinsurance, After Cash Flow Change Deferred Profit Liability, Before Reinsurance, After Cash Flow Change Prepaid expenses and other assets Prepaid Expense and Other Assets Non-PEO NEO Non-PEO NEO [Member] Certain FIA and certain MYGA Certain FIA And Certain MYGA [Member] Certain FIA And Certain MYGA Effect of actual variances from expected experience Deferred Profit Liability, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience Deferred Profit Liability, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax All Award Types Award Type [Domain] Amortization Contract With Customer Liability, Amortization Contract With Customer Liability, Amortization Non-controlling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] 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 Disaggregation of Revenue [Line Items] Disaggregation of Revenue [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. Compensation Amount Outstanding Recovery Compensation Amount Types Of Funds Held Under Reinsurance Agreements, Assets [Domain] Types Of Funds Held Under Reinsurance Agreements, Assets [Domain] [Domain] for Types Of Funds Held Under Reinsurance Agreements, Assets [Axis] Summary of the Reserve for Claim Losses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Revenue recognized Contract with Customer, Liability, Revenue Recognized Fair Value Total Estimated Fair Value Estimate of Fair Value Measurement [Member] Balance adjusted for variances from expectation Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change Fixed maturity securities, at fair value under the fair value option Fixed Maturity Securities, at Fair Value Under Fair Value Option Fixed Maturity Securities, at fair value under Fair Value Option Performing Performing Financial Instruments [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Schedule of Reconciliation of Future Policy Benefits to Statement of Financial Position Schedule Of Reconciliation Of Future Policy Benefits To Statement Of Financial Position [Table Text Block] Schedule Of Reconciliation Of Future Policy Benefits To Statement Of Financial Position Revenues: Revenues [Abstract] Range from 0051 to 0150 Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 [Member] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Schedule of Balances and Changes in the Present Value of Expected Net Premiums and Present Value Liability for Future Policy Benefit, Activity [Table Text Block] Fixed maturity securities, asset-backed securities Fixed Maturity Securities, Asset Backed Securities [Member] Fixed Maturity Securities, Asset Backed Securities 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 Debt offering Proceeds from Issuance of Subordinated Long-Term Debt Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Investment in unconsolidated affiliate Equity Method Investment, Measurement Input Equity Method Investment, Measurement Input Capitalization Deferred Sale Inducement Cost, Capitalization Hedged Liability, Statement of Financial Position Flag Hedged Liability, Statement of Financial Position [Extensible Enumeration] VOBA including amortization Present Value of Future Insurance Profits, Including Amortization Expense Present Value of Future Insurance Profits, Including Amortization Expense Other comprehensive earnings - unrealized gain on investments and other financial instruments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Financial Instruments [Domain] Financial Instruments [Domain] Assets, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Schedule of Other Intangible Assets, Indefinite Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Liabilities, Total (Losses) Gains Included in AOCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Payments for commissions Payments for Commissions Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Residential mortgage loans, location percentage Residential Mortgage Loans, Location Percentage Residential Mortgage Loans, Location Percentage Minimum Minimum [Member] Interest receivable Financing Receivable, Accrued Interest, before Allowance for Credit Loss Balance adjusted for variances from expectation Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change Company Selected Measure Name Company Selected Measure Name Actual policyholder behavior different from expected Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected Fair Value Measurement [Domain] Fair Value Measurement [Domain] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Operating lease payments Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Debt service payments Repayments of Senior Debt Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Liability for Future Policy Benefit, Expected Future Policy Benefit Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Liability for Future Policy Benefit, Activity Liability for Future Policy Benefit, Activity [Line Items] Indexed annuities/IUL ceded embedded derivatives Indexed Annuities/IUL Ceded Embedded Derivatives [Member] Indexed Annuities/IUL Ceded Embedded Derivatives Prior Prior Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Entity Small Business Entity Small Business Other operating expenses Other operating expenses Other Cost and Expense, Operating Mortgage loans delinquent in principal or interest Number Of Mortgage Loans Delinquent In Principal Or Interest Number Of Mortgage Loans Delinquent In Principal Or Interest Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Loss Expense Premium Loss Expense, Net Premium Loss Expense, Net Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Underlying Securities Award Underlying Securities Amount Gross gains Debt Securities, Available-for-Sale, Realized Gain Mortality Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate Limited partnerships Limited Partnership [Member] Limited Partnership [Member] Equity Component [Domain] Equity Component [Domain] Corporates, non-structured hybrids, municipal and government securities Corporates, Non-structured Hybrids, Municipal And Government securities: [Member] Corporates, Non-structured Hybrids, Municipal and Government Securities Document Period End Date Document Period End Date Interest accrual Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense Credit linked note Credit Linked Note [Member] Credit Linked Note [Member] Payment of contingent consideration for prior period acquisitions Payment for Contingent Consideration Liability, Financing Activities Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Statutory Capital and Surplus Statutory Accounting Practices, Statutory Capital And Surplus (Deficit), Balance Statutory Accounting Practices, Statutory Capital And Surplus (Deficit), Balance Deferred acquisition costs Deferred Policy Acquisition Costs Including Funding Agreements Deferred Policy Acquisition Costs Including Funding Agreements Schedule of Investments [Table] Schedule of Investments [Table] Valuation, Income Approach Valuation, Income Approach [Member] Policy loans Policy Loans [Member] Net credit risk Net Credit Risk Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Shares withheld for taxes and in treasury Noncontrolling Interest, Return Of Capital Noncontrolling Interest, Return Of Capital Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Investments in unconsolidated affiliates, fair value Investments in unconsolidated affiliates Investments in unconsolidated affiliates Equity Method Investments, Fair Value Disclosure Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Reinsurer, Name [Domain] Reinsurer, Name [Domain] Revenue from contract with customer Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] Mountain Mountain [Member] Mountain [Member] Mortality Multiplier Measurement Input, Mortality Rate [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Charges assessed to contractholders for mortality and admin Charges Assessed To Contract Holders For Mortality And Administration Mortality and expense charges and administrative fees. Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Current (less than 30 days past due) Current (less than 30 days past due) Financial Asset, 1 to 29 Days Past Due [Member] Debt-to-Value [Axis] Debt-to-Value [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Loan subservicing revenue Fees and Commissions, Mortgage Banking and Servicing Effect of changes in the instrument-specific credit risk AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax Schedule of Change in Fair Value of Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Unrealized gain on investments in unconsolidated affiliates Other comprehensive earnings - unrealized gain on investments in unconsolidated affiliates OCI, Equity Method Investment, after Tax Net earnings per share attributable to common shareholders, diluted (in usd per share) Earnings Per Share, Diluted Embedded derivative liability Embedded Derivative Liability, Measurement Input Multifamily Multifamily [Member] Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Commercial mortgage loans Investments, Commercial Mortgage Loans, Fair Value Disclosure Fair value of the investment commercial mortgage loan portfolio Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Policyholder Account Balance [Table] Policyholder Account Balance [Table] Cayman Islands CAYMAN ISLANDS Treasury stock (in shares) Beginning balance, Treasury stock (in shares) Ending balance, Treasury stock (in shares) Treasury Stock, Common, Shares Issuances Deferred Profit Liability, Issuance Deferred Profit Liability, Issuance Long-duration Contracts Assumptions [Axis] Long-duration Contracts Assumptions [Axis] Long-duration Contracts Assumptions Schedule of Reinsurance Recoverable Schedule Of Reinsurance Recoverable [Table Text Block] Schedule Of Reinsurance Recoverable Consolidation Items [Domain] Consolidation Items [Domain] Traditional Life Traditional life Traditional Life Insurance [Member] Traditional Life Insurance Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Reinsurer, Name [Axis] Reinsurer, Name [Axis] Breach of Contract Breach Of Contract [Member] Breach Of Contract 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 Reinsurance recoverable, net of allowance of $18 and $18 as of March 31, 2026 and December 31, 2025, respectively Reinsurance recoverable, net of allowance for expected credit losses Less: Reinsurance recoverable Reinsurance Recoverables, Including Reinsurance Premium Paid Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Issuances Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance Change in NAV of limited partnerships, net Unrealized Gain (loss) In Net Asset Value Of Limited Partnerships Unrealized Gain (loss) In Net Asset Value Of Limited Partnerships Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance Income taxes Income Taxes Paid, Net Number of defendants Loss Contingency, Number of Defendants Market risk benefit losses Market risk benefit gains (losses) Market Risk Benefit, Change in Fair Value, Gain (Loss) Unrealized (loss) gain on investments and other financial instruments (excluding investments in unconsolidated affiliates) OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Total CMLs, gross of valuation allowance Amortized Cost Amortized Cost Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Subsidiary dividends declared to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Derivative instruments excluding futures contracts Derivative Instruments Excluding Futures Contract [Member] Derivative Instruments Excluding Futures Contracts Schedule of Fair Value and Gross Unrealized Losses of Available-for-sale Securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Other Commitments [Domain] Other Commitments [Domain] Foreign Governments Debt Security, Government, Non-US [Member] Other investments Other Investments [Member] Property and equipment, net Property, Plant and Equipment, Net Benefit payments Policyholder Account Balance, Benefit Payment Non-Performance Spread Measurement Input, Non-Performance Spread [Member] Measurement Input, Non-Performance Spread Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Net decrease in trade receivables Increase (Decrease) in Accounts Receivable Wilton Reassurance Company Wilton Reassurance Company [Member] Wilton reassurance company. Entity Current Reporting Status Entity Current Reporting Status Derivative Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Total Assets, Carried On Balance Sheet At Other Than Fair Value, Amount Assets, Carried On Balance Sheet At Other Than Fair Value, Amount Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Gross Unrealized Losses, 12 months or longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 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 Amortization Deferred Profit Liability, Amortization Deferred Profit Liability, Amortization Market Comparable Company Analysis Valuation, Market Approach [Member] Current Fiscal Year End Date Current Fiscal Year End Date Commitment to Invest Commitment to Invest [Member] Commitment to Invest [Member] Gross Unrealized Losses Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Change in funds withheld from reinsurers Increase (Decrease) in Reinsurance Payables Balance, beginning of year Balance, end of period Total Policyholder Account Balance Including Customers With No Guaranteed Credit Rating Policyholder Account Balance Including Customers With No Guaranteed Credit Rating Schedule of Distribution of CMLs, Gross Valuation by Property Type and Geographic Region Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Third-Party Valuation Third Party Valuation Technique [Member] Third Party Valuation Technique [Member] Derivative liability Derivative Liability Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Reserves before NPR capping Reserves Before NP Ratio Capping Reserves Before NP Ratio Capping Deposit assets Deposit Contracts, Assets Schedule of Liability for Future Policy Benefit Expected Future Policy Benefit Undiscounted Before Reinsurance Schedule Of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted And Discounted [Table Text Block] Schedule Of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted And Discounted Total Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Distributions from unconsolidated affiliates, return on investment Proceeds from Equity Method Investment, Distribution Schedule of Carrying Amount and Estimated Fair Value of Assets and Liabilities on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Securities, at fair value Preferred and common equity securities Equity Securities, FV-NI, Current Antidilutive securities excluded from computation of EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Distribution Investments And Affiliates Distribution Investments And Affiliates [Member] Distribution Investments And Affiliates Other Other Property [Member] Reinsurance related embedded derivatives, included in Funds withheld for reinsurance liabilities Reinsurance Related Embedded Derivative [Member] Reinsurance Related Embedded Derivative Schedule of Reconciliation of Asset and Liability Market Risk Benefit, Asset And Liability [Table Text Block] Market Risk Benefit, Asset And Liability Direct title insurance premiums Insurance Contracts, Direct Title Insurance Premiums [Member] Insurance Contracts, Direct Title Insurance Premiums [Member] Other Commitments [Table] Other Commitments [Table] Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Provision (expense) benefit for loan losses Financing Receivable, Credit Loss, Expense (Reversal) Change in total benefits and other changes in policy reserves (decrease) increase Policyholder Benefits And Claims Incurred, Net, Life and Annuity, Change In Policy Reserves, Increase (Decrease) Policyholder Benefits And Claims Incurred, Net, Life and Annuity, Change In Policy Reserves, Increase (Decrease) Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Cash surrender value Policyholder Account Balance, Cash Surrender Value Equity options Equity Option [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Loan receivable, measurement input Loan Receivable, Measurement Input Loan Receivable, Measurement Input Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Investment expense Investment Income, Investment Expense Entity Tax Identification Number Entity Tax Identification Number Certain MYGA Certain MYGA [Member] Certain MYGA Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Other securities which provide for periodic payments, Fair Value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] 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). Schedule of 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. Commercial mortgage-backed securities Commercial mortgage-backed securities Commercial Mortgage-Backed Securities [Member] Value of Business Acquired ("VOBA"), Deferred Acquisition Costs ("DAC"), and Deferred Sales Inducements ("DSI") Goodwill and Intangible Assets Disclosure [Text Block] Less: Reinsurance recoverable Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance Other intangible assets, net Intangible Assets, Net (Excluding Goodwill And Title Plants) Intangible Assets, Net (Excluding Goodwill And Title Plants) Loan Commitment Loan Commitment [Member] Loan Commitment Trading Arrangement: Trading Arrangement [Axis] Net change in income taxes Increase (Decrease) in Income Taxes Payable Total Shareholder Return Amount Total Shareholder Return Amount Invested cash and short-term investments Invested Cash And Short Term Investments [Member] Invested cash and short-term investments. Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Liabilities, Total (Losses) Gains Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Loss Contingencies [Line Items] Loss Contingencies [Line Items] Security Exchange Name Security Exchange Name Up to 1.50% Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Range From 0.00% To 1.50% [Member] Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate Range, From 0.00% To 1.50% Expected credit losses on reinsurance recoverable Allowance for expected credit losses Reinsurance Recoverable, Allowance for Credit Loss 60.00% to 74.99% LTV 60 to 74.99 Percent [Member] LTV 60 to 74.99 Percent Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Other Policyholder Account Balance, Increase (Decrease) from Other Change Retail Retail Site [Member] Ceded Ceded Premiums Earned Reinsurance Disclosures [Abstract] Reinsurance Disclosures [Abstract] Effect of changes in discount rate assumptions AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax Assets, Total (Losses) Gains Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Statement [Line Items] Statement [Line Items] Carrying Amount of Hedged Assets Hedged Asset, Fair Value Hedge Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents, as of March 31, 2026 and December 31, 2025 includes $329 and $261, respectively, of pledged cash related to secured trust deposits (2026 and 2025 include $1 and $2 related to investments held by consolidated VIEs) Cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Common Stock Common equity securities Common Stock [Member] 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 Acquisitions and dispositions Payments to Acquire Businesses, Net Of Dispositions Payments to Acquire Businesses, Net Of Dispositions Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation South Atlantic South Atlantic US [Member] South Atlantic US [Member] Conditional Prepayment Rate Measurement Input, Prepayment Rate [Member] Balance, beginning of year Balance, end of period Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change Year four Year four Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Change in valuation of derivatives, equity securities, preferred securities, and other assets, net Unrealized Gain (Loss) on Investments Market Value of AnchorPath Fund Measurement Input Type, Market Value of Fund [Member] Measurement Input Type, Market Value of Fund Statistical Measurement [Domain] Statistical Measurement [Domain] Year five Year five Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year All Counterparties Except One All Counterparties Except One [Member] All Counterparties Except One Fixed maturity securities, available-for-sale securities, amortized cost Amortized Cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss 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 Related Party Transaction [Axis] Related Party Transaction [Axis] Benefits payments Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment Real Estate [Domain] Real Estate [Domain] Derivative investments Foreign currency swaps, included in Accounts payable and accrued liabilities Interest rate swaps Interest Rate Swap [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Assets, Total (Losses) Gains Included in AOCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Company-owned life insurance Bank Owned Life Insurance Equity in (losses) earnings of unconsolidated affiliates Equity in earnings of unconsolidated affiliates Equity in earnings of unconsolidated affiliates Income (Loss) from Equity Method Investments 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 Change in market risk benefits, net Market Risk Benefit, Increase (Decrease), Net Market Risk Benefit, Increase (Decrease), Net Greater than 2.50% Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Range, Greater Than 2.50% [Member] Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Range, Greater Than 2.50% Equity options Equity options Call Option [Member] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net earnings per share attributable to common shareholders, basic (in usd per share) Earnings Per Share, Basic Liabilities Liabilities Liabilities, Fair Value Disclosure [Abstract] VOBA Movement in Present Value of Future Insurance Profits [Roll Forward] Aspida Aspida [Member] Aspida FABN FABN Funding Agreements, FABN [Member] Funding Agreements, FABN Raven Re (VT) Raven Reinsurance Company [Member] Raven Reinsurance Company Investment received as non-cash consideration for sale of F&G Life Re Investment Received as Non-Cash Consideration for Sale of Related Party Investment Received as Non-Cash Consideration for Sale of Related Party Discount rate Measurement Input, Discount Rate [Member] Other comprehensive earnings Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Weighted-average duration of liability for future policyholder benefits (years) Liability for Future Policy Benefit, Weighted-Average Duration EBITDA Multiple Measurement Input, EBITDA Multiple [Member] Measurement Input Type [Domain] Measurement Input Type [Domain] Policyholder Account Balance Policyholder Account Balance [Line Items] Affiliated Entity Affiliated Entity [Member] Policy charges Policyholder Account Balance, Policy Charge Escrow, title-related and other fees Escrow, title related and other fees Insurance Commissions and Fees Charge offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Schedule of Reconciliation of Policyholder Account Balances to Statement of Financial Position Schedule Of Reconciliation Of Policyholder Account Balances To Statement Of Financial Position [Table Text Block] Schedule Of Reconciliation Of Policyholder Account Balances To Statement Of Financial Position Weighted-average attained age of policyholders weighted by total AV (years) Net Amount At Risk By Product And Guarantee, Weighted Average Attained Age Of Policyholders Weighted By Total AV Net Amount At Risk By Product And Guarantee, Weighted Average Attained Age Of Policyholders Weighted By Total AV Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Cash and Cash Equivalents Cash and cash equivalents Cash and Cash Equivalents [Member] Asset-backed lending Asset-backed Lending [Member] Asset-backed Lending Unrealized gain (loss) on foreign currency translation, tax expense (benefit) Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Additional investments in unconsolidated affiliates Payments to Acquire Equity Method Investments Hedging Designation [Domain] Hedging Designation [Domain] 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] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total liabilities and equity Liabilities and Equity DAC at beginning of period DAC at end of period Deferred Policy Acquisition Cost Premiums received Policyholder Account Balance, Premium Received New England New England [Member] New England [Member] Policyholder account balance, above guaranteed minimum crediting rate Policyholder Account Balance, above Guaranteed Minimum Crediting Rate Accounting Policies [Abstract] Accounting Policies [Abstract] Unrealized gain on investments in unconsolidated affiliates, tax expense OCI, Equity Method Investment, Tax Revenue Recognition and Deferred Revenue [Abstract] Net earnings (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Treasury Stock Treasury Stock, Common [Member] Contract With Customer Liability Contract With Customer Liability [Roll Forward] Contract With Customer Liability Year one Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Certain MYGA and deferred annuities Certain MYGA And Deferred Annuities [Member] Certain MYGA And Deferred Annuities Schedule of Rollforward of Deferred Sale Inducement Cost Deferred Sale Inducement Cost [Table Text Block] Pay vs Performance Disclosure [Line Items] U.S. Government US Government Agencies Debt Securities [Member] Lease liabilities Operating Lease, Liability Other loans Other Loans Other Loans Effects of Reinsurance [Table] Effects of Reinsurance [Table] 90 days or more past due 90 days or more past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities: Liabilities [Abstract] Total financial liabilities at fair value Financial Liabilities Fair Value Disclosure Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Policy period Contract With Customer, Policy Period Contract With Customer, Policy Period 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] Year three Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Liability for Future Policy Benefit, Expected Net Premium Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] Comprehensive earnings attributable to Fidelity National Financial, Inc. common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Contingent consideration Contingent Consideration Liability [Member] Contingent Consideration Liability Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Home warranty contract, period Home Warranty Contract, Period Home Warranty Contract, Period Schedule of Changes in Fair Value of Financial Instruments - Liabilities Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Proceeds from sales, calls and maturities of investment securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale 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 Deferred tax liability Deferred Income Tax Liabilities, Net F&G Cayman Re Ltd F&G Cayman Re Ltd [Member] F&G Cayman Re Ltd Schedule of Liability for Future Policy Benefits, Additional Information Liability For Future Policy Benefits, Additional Information [Table Text Block] Liability For Future Policy Benefits, Additional Information Agency title insurance premiums Agency title insurance premiums Assumed Premiums Written Futures contracts Future [Member] Ancient Financial Holdings, LP Ancient Financial Holdings, LP [Member] Ancient Financial Holdings, LP Subtotal Level 3 liabilities at fair value Total Liabilities Before Market Risk Benefit [Member] Total Liabilities Before Market Risk Benefit Notes payable Long-Term Debt Offered Quotes Measurement Input, Quoted Price [Member] Schedule of Financial Strength Ratings of Principal Reinsurers Schedule Of Credit Ratings Of Principal Reinsurers [Table Text Block] Schedule Of Credit Ratings Of Principal Reinsurers Trade and notes receivables, net of allowance of $30 and $31 as of March 31, 2026 and December 31, 2025, respectively Trade and notes receivables, net of allowance Accounts and Financing Receivable, after Allowance for Credit Loss Greater Than 0150 Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Greater Than 0150 [Member] Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Greater Than 0150 Total assets Assets Assets Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Balance, beginning of period, before effect of changes in the instrument-specific credit risk Balance, end of period, before effect of changes in the instrument-specific credit risk Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change Geographical [Domain] Geographical [Domain] Derivatives for Trading and Investment Derivatives For Trading And Investment [Member] Derivatives For Trading And Investment [Member] Financing Receivable, Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Roll Forward] Other loans, within other long-term investments, Aggregate unpaid principal Other Loans Within Other Long-term Investments, Aggregate Unpaid Principal Other Loans Within Other Long-term Investments, Aggregate Unpaid Principal Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Basis of Financial Statements Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Net liability, after reinsurance Policyholder Account Balance, Net Of Deposit Asset Policyholder Account Balance, Net Of Deposit Asset Assets Assets Assets, Fair Value Disclosure [Abstract] Mortgage loans Mortgage loans Mortgage Loans [Member] Mortgage Loans Fixed maturity securities, at fair value under fair value option Debt Securities, Held-to-Maturity, Fair Value Cash dividend per common share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Attributed fees collected and interest accrual Market Risk Benefit, Attributed Fee Collected Lease liabilities recognized in exchange for lease right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Allowance for doubtful accounts, premiums and other receivables Allowance for Doubtful Accounts, Premiums and Other Receivables Investments in unconsolidated affiliates (2026 and 2025 includes $270 and $262 related to investments held by consolidated variable interest entities ("VIEs") and 2026 and 2025 include certain investments at fair value of $260 and $270, respectively) Investments in unconsolidated affiliates Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Changes in instrument-specific credit risk - market risk benefits Change in instrument-specific credit risk - market risk benefits OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments and Tax Investments in unconsolidated affiliates Limited partnerships Equity Method Investments [Member] Mixed Use Mixed Use Property [Member] Mixed Use Property Block of traditional, IUL and UL Block Of Traditional, IUL And UL [Member] Block Of Traditional, IUL And UL Fair value of assets acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Total financial liabilities at fair value Financial Liabilities, Net Fair Value Disclosure Financial Liabilities, Net Fair Value Disclosure PEO PEO [Member] Ancient Re Ancient Re [Member] Ancient Re Number of class action lawsuits Loss Contingency, Pending Claims, Number Schedule of Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Fair value hedging adjustments for hedged assets Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Indexed annuities/IUL embedded derivatives Fixed Annuity, IUL Embedded Derivatives [Member] Fixed Annuity, IUL Embedded Derivatives Credit Quality Indicator Prior Year [Abstract] Credit Quality Indicator Prior Year [Abstract] Credit Quality Indicator Prior Year Earnings before income taxes and equity in earnings of unconsolidated affiliates Earnings (loss) before income taxes and equity in earnings of unconsolidated affiliates Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Other comprehensive loss attributable to non-controlling interest Other comprehensive earnings (loss) associated with noncontrolling interests Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable To Noncontrolling Interest, Spinoff Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable To Noncontrolling Interest, Spinoff Debt Service Coverage Ratio [Axis] Debt Service Coverage Ratio [Axis] Debt Service Coverage Ratio Reinsurance recoverable, gross of allowance Reinsurance Recoverables, Gross Corporate and Other Corporate Segment and Other Operating Segment [Member] United States UNITED STATES Changes in assets and liabilities, net of effects from acquisitions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Retained Earnings Retained Earnings [Member] Total title claims paid, net of recoupments Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative investments Derivative investments Derivative Asset Fair Value, 12 months or longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Remeasurement of lease liabilities Lessee, Operating Lease, Remeasurement Of Lease Liability Lessee, Operating Lease, Remeasurement Of Lease Liability Product and Service [Domain] Product and Service [Domain] Fixed maturity securities available-for-sale: Debt Securities, Available-for-Sale [Abstract] Direct Direct [Member] Direct Gross liability, end of period Contractholder funds Policy Holder Account Balance, Gross Liability Policy Holder Account Balance, Gross Liability Interest and investment income Interest and investment income Interest and investment income Net Investment Income Net earnings Net earnings Net earnings Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Preferred/Equity securities Equity Securities, FV-NI, Measurement Input Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Liabilities, fair value Liabilities, Fair Value Disclosure Business Combination [Table] Business Combination [Table] Total significant segment expenses Segment Reporting, Significant Expenses, Total Segment Reporting, Significant Expenses, Total Gross Notional Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Carrying Value and Maximum Loss Exposure, Unconsolidated VIEs Schedule of Carrying Value and Maximum Loss Exposure, Unconsolidated VIEs [Table Text Block] Schedule of Carrying Value and Maximum Loss Exposure, Unconsolidated VIEs Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain] Debt Service Coverage Ratio [Domain] Debt Service Coverage Ratio [Domain] Debt Service Coverage Ratio City Area Code City Area Code Schedule of Allowance for Expected Credit Losses on Loans Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Investments Investment [Text Block] Available-for-sale securities, pledged securities, secured trust deposits Debt Securities, Available-For-Sale Securities, Pledged, Customer Advances And Deposits Debt Securities, Available-For-Sale Securities, Pledged, Customer Advances And Deposits EBITDA Volatility Measurement Input, EBITA Volatility [Member] Measurement Input, EBITA Volatility Liabilities, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Schedule of Information about Trade Receivables and Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Damages from Product Defects Damages from Product Defects [Member] Middle Atlantic Middle Atlantic US [Member] Middle Atlantic US [Member] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Fair Value Hedging Fair Value Hedging [Member] Net realized losses on fixed maturity available-for-sale securities Debt Securities, Realized Gain (Loss) Income tax expense as percentage of earnings before income taxes, percent Income Tax Expense As Percentage Of Earnings Before Income Taxes, Percent Income Tax Expense As Percentage Of Earnings Before Income Taxes, Percent Goodwill Goodwill Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Recognized gains and losses, net Recognized gains and losses, net Recognized gains and losses, net Gain (Loss) on Investments Number of counterparties, net exposure threshold set to zero Number of Counterparties, Net Exposure Threshold Not Set to Zero Number of Counterparties, Net Exposure Threshold Not Set to Zero Loan receivable, included in Prepaid expenses and other assets Notes Receivable, Fair Value Disclosure Benefits and other changes in policy reserves Benefits and other changes in policy reserves Policyholder Benefits And Claims Incurred, Net, Life And Annuity Remeasurement Gains (Losses) Policyholder Benefits And Claims Incurred, Net, Life And Annuity Remeasurement Gains (Losses) Market risk benefit Market Risk Benefit, Measurement Input Subtotal, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Surrender Rates Measurement Input, Surrender Rates [Member] Measurement Input, Surrender Rates Market Risk Benefit Type [Axis] Market Risk Benefit Type [Axis] Market Risk Benefit Type Cash paid for: Supplemental Cash Flow Information [Abstract] Commission Fees Paid Commission Fees Paid [Member] Commission Fees Paid Net change in secured trust deposits Payments For (Proceeds From) Secured Trust Deposits Payments For (Proceeds From) Secured Trust Deposits Other Performance Measure, Amount Other Performance Measure, Amount Change in fair value of reinsurance related embedded derivatives Derivative, Gain (Loss) On Reinsurance Embedded Derivatives, Net Derivative, Gain (Loss) On Reinsurance Embedded Derivatives, Net Short term investments Short-term Investments, Fair Value Short-term Investments, Fair Value Market Risk Benefits Contractholder Funds Long-Duration Insurance Contracts Disclosure [Text Block] Statutory Net income (loss) Statutory Accounting Practices, Statutory Net Income (Loss) Amount Statutory Accounting Practices, Statutory Net Income (Loss) Amount Related Party [Domain] Related and Nonrelated Parties [Domain] Present Value of Future Insurance Profit [Table] Present Value of Future Insurance Profit [Table] FHLB common stock FHLB Common Stock, Fair Value FHLB Common Stock, Fair Value PRT Pension Risk Transfers [Member] Pension Risk Transfers (PRT) Net realized gain on sale of F&G Life Re Equity Securities, FV-NI, Gain (Loss) Litigation Status [Axis] Litigation Status [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Changes in assumptions and other Market Risk Benefit, Increase (Decrease) from Other Assumption Indexed Annuities Indexed annuities Indexed Annuity [Member] Cash related to secured trust deposits Restricted Cash URL Unearned Revenue Liabilities [Member] Unearned Revenue Liabilities PRT PRT PRT [Member] PRT Additional paid-in capital Additional Paid in Capital, Common Stock Investments: Investments [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Insurance contracts Insurance Contracts [Member] Insurance Contracts [Member] Gain on the sale of businesses Gain (loss) on disposition of business Gain (Loss) on Disposition of Business Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Schedule of Effect of Reinsurance on Premiums Earned, Benefits Incurred and Reserve Changes Effects of Reinsurance [Table Text Block] Basis of Financial Statements Basis of Accounting, Policy [Policy Text Block] Lease assets Operating Lease, Right-of-Use Asset Capitalization Contract With Customer Liability, Additions Contract With Customer Liability, Additions Schedule of Rollforward of Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Table Text Block] Computer software Computer Software, Intangible Asset [Member] Carrying Amount Reported Value Measurement [Member] Amortization VOBA amortization Present Value of Future Insurance Profits, Amortization Expense GMWB Utilization Measurement Input, GMWB Utilization [Member] Measurement Input, GMWB Utilization Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Equity [Abstract] Limited partnerships Limited Partnerships, Investment Income, Net Limited Partnerships, Investment Income, Net Liabilities, Net transfer In (Out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Hybrids Hybrids Hybrids [Member] Hybrids. Estimated litigation liability Estimated Litigation Liability Net Premiums Earned Premiums Earned, Net [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] 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] Home warranty Insurance Contracts, Home Warranty [Member] Insurance Contracts, Home Warranty [Member] Other Commitments [Line Items] Other Commitments [Line Items] All other states All Other States [Member] All Other States [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Line Items] Weighted-average crediting rate Policyholder Account Balance, Weighted Average Crediting Rate Schedule of Unfunded Commitments Other Commitments [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] No guaranteed minimum crediting rate Policyholder Account Balance With No Guaranteed Minimum Crediting Rate Policyholder Account Balance With No Guaranteed Minimum Crediting Rate Contingent consideration, included in Accounts payable and accrued liabilities Business Combination, Contingent Consideration, Liability Weighted Average Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Loans with Credit Quality Indicators, Performing or Nonperforming Schedule of Loans with Credit Quality Indicators, Performing or Nonperforming [Table Text Block] Schedule of Loans with Credit Quality Indicators, Performing or Nonperforming Debt securities Debt Securities, Available-for-Sale, Measurement Input Non-performing Nonperforming Financial Instruments [Member] Depreciation and amortization Depreciation, Depletion and Amortization Residential mortgage-backed securities Residential mortgage-backed securities Residential Mortgage-Backed Securities [Member] Funds withheld for reinsurance liabilities Funds Held under Reinsurance Agreements, Liability Funds Held under Reinsurance Agreements, Liability Direct title insurance premiums Direct title insurance premiums Direct Premiums Written Arrangement Duration Trading Arrangement Duration DSI amortization Amortization Deferred Sales Inducement Cost, Amortization Expense Derivative, Gain (Loss), Statement of Income or Comprehensive Income Flag Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Schedule of Consolidated Investments Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Segments [Axis] Segments [Axis] Investments transferred subject to reinsurance agreement Noncash Investing and Financing Activities, Investments Received From Pension Risk Transfer Premiums Noncash Investing and Financing Activities, Investments Received From Pension Risk Transfer Premiums Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Net other investing activities Payment for (Proceeds from) Other Investing Activity Surrenders and withdrawals Policyholder Account Balance, Surrender and Withdrawal ASSETS Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Less than 1.00 Less Than One Point Zero Zero [Member] Less Than One Point Zero Zero Other Commitments [Axis] Other Commitments [Axis] Balance beginning of period Balance, end of period Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Investment contracts, included in Contractholder funds Liabilities Related to Investment Contracts, Other Than Fair Value Disclosure Liabilities Related to Investment Contracts, Other Than Fair Value Disclosure Equity: Equity, Attributable to Parent [Abstract] Repurchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Agent commissions Agent commissions Insurance Commissions Investment, Name [Axis] Investment, Name [Axis] Available-for-sale securities Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Schedule of Revenue from External Customers by Products and Services Revenue from External Customers by Products and Services [Table Text Block] Discounted Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted [Abstract] Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted Expected experience Long-Duration Contracts, Assumptions, Expected Experience [Member] Long-Duration Contracts, Assumptions, Expected Experience Change in F&G outside tax basis Other Comprehensive Income (Loss), Outside Tax Basis Other Comprehensive Income (Loss), Outside Tax Basis Other long-term investments (2026 and 2025 include $246 and $248 related to investments held by consolidated VIEs) Other long-term investments Other long-term investments Other Long-Term Investments Actual experience Long-Duration Contracts, Assumptions, Actual Experience [Member] Long-Duration Contracts, Assumptions, Actual Experience Assets Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Trade receivables Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Other title-related fees and income Other Title Related Fees And Income [Member] Other Title Related Fees And Income [Member] Deferred Profit Liability Rollforward Deferred Profit Liability Rollforward [Roll Forward] Deferred Profit Liability Rollforward Corporate and other Corporate And Reconciling Items [Member] Corporate And Reconciling Items [Member] Total financial assets at fair value Assets, fair value Assets, Fair Value Disclosure Liabilities assumed in connection with acquisitions Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract] Total number of available-for-sale securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Subtotal Level 3 assets at fair value Total Assets At Fair Value Before Market Risk Benefit Asset [Member] Total Assets At Fair Value Before Market Risk Benefit Asset 30-89 days past due 30-89 days past due Financial Asset, 30 to 89 Days Past Due [Member] Financial Asset, 30 to 89 Days Past Due Schedule of Rollforward of Unearned Revenue Liabilities (URL) Contract With Customer Liability [Table Text Block] Contract With Customer Liability Counterparty Discount Rate Measurement Input, Counterparty Discount Rate [Member] Measurement Input, Counterparty Discount Rate Related Party [Axis] Related and Nonrelated Parties [Axis] Fair value, option, loans held as assets, 90 days or more past due Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due Schedule of Other Intangible Assets, Finite Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Liability for Future Policy Benefit, Weighted Average Discount Rates Schedule Of Liability For Future Policy Benefit, Weighted Average Discount Rates [Table Text Block] Schedule Of Liability For Future Policy Benefit, Weighted Average Discount Rates West North Central West North Central US [Member] West North Central US [Member] Other financing activities Proceeds from (Payment for) Other Financing Activity Effects of market related movements Market Risk Benefit, Increase (Decrease) from Equity Market Change Name Trading Arrangement, Individual Name Net valuation losses Equity Securities, FV-NI, Valuation Gain (Loss) Equity Securities, FV-NI, Valuation Gain (Loss) Collateral Volatility Measurement Input, Collateral Volatility [Member] Measurement Input, Collateral Volatility F&G repurchases of F&G stock Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Present Value of Future Insurance Profit [Line Items] Present Value of Future Insurance Profit [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] F&G F&G F&G Segment [Member] F&G Segment Change in Unrealized Included in OCI Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Preferred equity securities Preferred equity securities Preferred Stock [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Unfunded investment commitment Other Commitment Other derivative investments Other derivative investments Other Derivative Investments [Member] Other Derivative Investments Other fixed maturity securities, AFS Fixed maturities, AFS Fixed Maturities Available For Sale [Member] Fixed Maturities Available For Sale [Member] Less: Comprehensive earnings attributable to non-controlling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Fixed maturity securities Fixed Maturity Securities [Member] Fixed Maturity Securities Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock, 63 and 61 shares as of March 31, 2026 and December 31, 2025, respectively, at cost Treasury Stock, Value East North Central East North Central US [Member] East North Central US [Member] Unrealized gain (loss) on investments and other financial instruments, tax expense (benefit) OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Title Title Title Segment [Member] Title Segment Other invested assets Investments, Affiliated Bank Loan, Fair Value Disclosure Investments, Affiliated Bank Loan, Fair Value Disclosure Litigation Case [Axis] Litigation Case [Axis] Liability Class [Axis] Liability Class [Axis] Year three Year three Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Segments [Domain] Segments [Domain] Plaintiffs claim losses amount Loss Contingency, Damages Sought, Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Derivatives: Derivative Asset [Abstract] Contractholder funds Policyholder Account Balance Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Change in allowance for expected credit losses Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Option Cost Measurement Input, Option Cost [Member] Measurement Input, Option Cost Purchases of investment securities Payments to Acquire Debt Securities, Available-for-Sale Preferred stock, $0.0001 par value; authorized 50 shares; issued and outstanding, none Preferred Stock, Value, Issued Municipals US States and Political Subdivisions Debt Securities [Member] Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Year two Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Policy loans Policy Loans, Fair Value Policy Loans, Fair Value Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] DAC amortization Amortization Deferred Policy Acquisition Costs, Amortization Expense Current year Current Year Claims and Claims Adjustment Expense FNF common stock, $0.0001 par value; authorized 600 shares as of March 31, 2026 and December 31, 2025; outstanding of 269 and 271 as of March 31, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Direct Direct Product Fees Direct Product Fees Insurance Distribution Consulting, LLC v. Fidelity & Guaranty Life Insurance Company Insurance Distribution Consulting, LLC v. Fidelity & Guaranty Life Insurance Company [Member] Insurance Distribution Consulting, LLC v. Fidelity & Guaranty Life Insurance Company Net Premiums Earned, Net Short-term investments Short-Term Investments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Schedule of Recognized Gains and Losses, net Realized Gain (Loss) on Investments [Table Text Block] NAV Fair Value Measured at Net Asset Value Per Share [Member] Business Combination [Axis] Business Combination [Axis] Comprehensive earnings Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Balance, beginning of year Balance, end of period Deferred profit liability Deferred Profit Liability Deferred Profit Liability Non-controlling Interests Noncontrolling Interest [Member] Changes in instrument-specific credit risk - market risk benefits, tax expense OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments, Tax Market Risk Benefit Type [Domain] Market Risk Benefit Type [Domain] Market Risk Benefit Type [Domain] Loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Short term investments Short-Term Investments [Member] Ceded Policyholder Benefits and Claims Incurred, Ceded Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of the Hedged (Liabilities) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Indexed annuities/IUL ceded embedded derivatives, included in Reinsurance recoverable Indexed Annuities/IUL Ceded Embedded Derivatives, Included In Reinsurance Recoverable Indexed Annuities/IUL Ceded Embedded Derivatives, Included In Reinsurance Recoverable PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Types Of Funds Held Under Reinsurance Agreements, Assets [Axis] Types Of Funds Held Under Reinsurance Agreements, Assets [Axis] Types Of Funds Held Under Reinsurance Agreements, Assets [Axis] Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Derivative instruments Derivative Financial Instruments, Assets [Member] Carrying Amount of Hedged (Liabilities) Hedged Liability, Fair Value Hedge Available-for-sale embedded derivative Available For Sale Embedded Derivatives [Member] Available-for-sale embedded derivatives. Traditional Life Insurance Premiums Life Insurance Product Line [Member] Revenue from Contract with Customer [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Debt Debt Instrument, Fair Value Disclosure Schedule of Reinsurance Funds Withheld Schedule of Reinsurance Funds Withheld [Table Text Block] Schedule of Reinsurance Funds Withheld Net Product Fees Net Product Fees [Abstract] Net Product Fees Future Policy Benefits Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] F&G Life Re F&G Life Re [Member] F&G Life Re California CALIFORNIA Number of instruments held Derivative, Number of Instruments Held Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] F&G common stock offering Proceeds from Issuance of Common Stock Gross losses Debt Securities, Available-for-Sale, Realized Loss Assets, Net transfer In (Out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Residential mortgage loans, percentage of total investments Residential Mortgage Receivable, Percentage of Total Percentage of the total residential loan portfolio All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Number of similar lawsuits filed against other entities (over) Loss Contingency, Pending Claims, Other Entities, Number Loss Contingency, Pending Claims, Other Entities, Number Name Forgone Recovery, Individual Name Unrealized losses on certain derivative instruments Unrealized Gain (Loss) on Derivatives Market risk benefits asset Market risk benefits asset Market Risk Benefit, Asset, Amount Reinsurance related embedded derivatives Reinsurance related embedded derivatives Embedded Derivatives in Reinsurance Contracts [Member] Embedded Derivatives in Reinsurance Contracts Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] 1.51%-2.50% Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Range From 1.51% To 2.50% [Member] Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate Range, From 1.51% To 2.50% Municipals Municipals Municipals [Member] Municipals. Credit Quality Indicator Current Year [Abstract] Credit Quality Indicator Current Year [Abstract] Credit Quality Indicator Current Year Change in derivative collateral liabilities Increase (Decrease) In Derivative Collateral Liabilities Increase (Decrease) In Derivative Collateral Liabilities Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Short-term investments (2026 and 2025 include $33 and $116 related to investments held by consolidated VIEs) Other Short-Term Investments Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Less than 50.00% LTV Less Than 50 Percent [Member] Loan-to-value (LTV) ratio less than 50%. Expected future benefit payments Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted, Before Reinsurance Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted, Before Reinsurance Liability for Future Policy Benefit Activity [Table] Liability for Future Policy Benefit Activity [Table] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Net realized/unrealized losses on other invested assets Gain (Loss) on Sale of Other Investments Contractholder account deposits Proceeds from Annuities and Investment Certificates Geographical [Axis] Geographical [Axis] Commercial Mortgage Commercial Portfolio Segment [Member] Net change in other assets and other liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Other long-term investments, Fair Value Other Loans Within Other Long-term Investments, Fair Value Other Loans Within Other Long-term Investments, Fair Value Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Interest accretion rate Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate Change in F&G outside tax basis APIC, Gain (Loss) Change In Outside Tax Basis APIC, Gain (Loss) Change In Outside Tax Basis Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Deferred Policy Acquisition Cost [Table] Deferred Policy Acquisition Cost [Table] IOWA IOWA Statutory Accounting Practices, Jurisdiction [Domain] Statutory Accounting Practice, Jurisdiction [Domain] Claims paid, net of recoupments related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Distributions from unconsolidated affiliates, return of investment Proceeds from Equity Method Investment, Distribution, Return of Capital Change in future policy benefits Increase (Decrease) in Future Policy Benefit Reserves Goodwill, written off related to sale of business unit Goodwill, Written off Related to Sale of Business Unit Recognized gains (losses), net for hedged item Gain (Loss) on Fair Value Hedges Recognized in Earnings Other embedded derivatives Other embedded derivatives Embedded Derivative Financial Instruments [Member] Number of permitted practices Statutory Accounting Practices, Number Of Permitted Practices Statutory Accounting Practices, Number Of Permitted Practices Accounts payable and accrued liabilities and reconciling items Accounts Payable and Accrued Liabilities [Member] Balance, end of period, net of reinsurance Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change Risk-Adjusted Discount Rate Measurement Input, Risk Adjusted Discount Rate [Member] Measurement Input, Risk Adjusted Discount Rate Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Repurchases of treasury stock (in shares) Treasury Stock, Shares, Acquired Fixed maturity securities, at fair value under fair value option Fair Value Option, Equity Method Investments [Member] Fair Value Option, Equity Method Investments Award Timing Disclosures [Line Items] Reserve for title claim losses Liability for Unpaid Claims and Claims Adjustment Expense, Net Dividends Equity [Text Block] Mortgage loans, net of allowance of $97 and $86 as of March 31, 2026 and December 31, 2025, respectively Total CMLs, net of valuation allowance Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss F&G Reinsurance Reinsurance [Text Block] Net earnings attributable to Fidelity National Financial, Inc. common shareholders Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Derivative, strike price Derivative, Price Risk Option Strike Price Pending Litigation Pending Litigation [Member] Net realized/unrealized losses on derivatives and embedded derivatives Change In Fair Value Derivatives, Including Other Derivatives Change In Fair Value Derivatives, Including Other Derivatives Direct Lending Direct Lending [Member] Direct Lending Future policy benefits Future policy benefits Liability for Future Policy Benefit, before Reinsurance Schedule of Reconciliation of DAC to Condensed Consolidated Balance Sheets Schedule Of Reconciliation Of Deferred Policy Acquisition Cost To Statement Of Financial Position [Table Text Block] Schedule Of Reconciliation Of Deferred Policy Acquisition Cost To Statement Of Financial Position Additions to property and equipment, capitalized software and title plants Payments To Acquire Property, Plant, And Equipment, Software And Title Plants Payments To Acquire Property, Plant, And Equipment, Software And Title Plants Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchases of treasury stock Payments for Repurchase of Common Stock Income taxes payable Taxes Payable Adoption Date Trading Arrangement Adoption Date Net premiums collected Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected Hedged Asset, Statement of Financial Position Flag Hedged Asset, Statement of Financial Position [Extensible Enumeration] Residential mortgage loans Investments, Residential Mortgage Loans, Fair Value Disclosure Fair value of the investment residential mortgage loan portfolio Elimination Consolidation, Eliminations [Member] Florida FLORIDA Retained earnings Retained Earnings (Accumulated Deficit) Change in fair value of other derivatives and embedded derivatives Reconciling items Embedded Derivative, Gain (Loss) on Embedded Derivative, Net Residential Mortgage Residential Portfolio Segment [Member] At Guaranteed Minimum Policyholder Account Balance, at Guaranteed Minimum Crediting Rate [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Contingent consideration, included in Accounts payable and accrued liabilities Contingent Consideration [Member] Contingent Consideration Total number of available-for-sale securities in an unrealized loss position less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Statement [Table] Statement [Table] Adjustments to reconcile net earnings to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Everlake Everlake Life Insurance Company [Member] Everlake Life Insurance Company Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Beginning balance (in shares) Ending balance (in shares) Shares, Issued Balance, beginning Balance, ending Contract with Customer, Liability Loan principal outstanding Other Receivables, Gross, Current Schedule of Changes in Fair Value of Financial Instruments - Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Interest expense Liability for Future Policy Benefit, Interest Expense Amendment Flag Amendment Flag DAC Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Accrued interest receivable Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Schedule of Liability for Future Policy Benefit, Mortality and Lapse, Actual and Expected Experience Schedule Of Liability for Future Policy Benefit, Mortality And Lapse, Actual And Expected Experience [Table Text Block] Schedule Of Liability for Future Policy Benefit, Mortality And Lapse, Actual And Expected Experience Liabilities, Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Beginning balance Ending balance of claim loss reserve for title insurance Liability for Claims and Claims Adjustment Expense Termination Date Trading Arrangement Termination Date Beginning balance at original discount rate Ending balance at original discount rate Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Allowance for credit loss Allowance for expected credit loss Allowance for expected loan loss Beginning Balance Ending Balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Less: reinsured market risk benefits Market Risk Benefit, Reinsurance Recoverable, after Allowance Total consolidated VIE investments Net Assets Reinsurance risk charge fee Reinsurance Risk Charge Fee Reinsurance Risk Charge Fee Student Housing Student Housing [Member] Student Housing Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Segment Reporting [Abstract] Market Risk Benefit [Roll Forward] Market Risk Benefit [Roll Forward] Non-cash lease costs Operating Lease, Expense Expenses: Costs and Expenses [Abstract] Interest accrual Deferred Profit Liability, Interest Expense Deferred Profit Liability, Interest Expense Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Allowance for credit loss for securities in an unrealized loss position Debt Securities, Available-For-Sale, Unrealized Loss Position, Allowance For Credit Loss, Excluding Accrued Interest Debt Securities, Available-For-Sale, Unrealized Loss Position, Allowance For Credit Loss, Excluding Accrued Interest Common stock, par or stated value per share (in usd per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] Changes in current discount rate - future policy benefits Change in current discount rate — liability for future policy benefits OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax Derivative Instruments and Hedging Activities Disclosures Derivative Instruments and Hedging Activities Disclosures [Line Items] Net realized/unrealized losses on equity and preferred securities Equity Securities, FV-NI, Realized Gain (Loss) Allowance for credit loss, probability of loss/default, using market historical loss experience, period Financing Receivable, Allowance For Credit Loss, Probability of Projected Loss, Default, Projection Model, Using Market Historical Loss, Period Financing Receivable, Allowance For Credit Loss, Probability of Projected Loss, Default, Projection Model, Using Market Historical Loss, Period Assets, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Unrealized (loss) gain on foreign currency translation Other comprehensive earnings (loss) - unrealized gain (loss) on foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] NPR before capping Net Premium Ratio Before Capping Net Premium Ratio Before Capping Prior Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Change in reinsurance recoverable Change in insurance recoverable Increase (Decrease) in Reinsurance Recoverable Fixed maturity securities, available-for-sale securities, allowance for credit losses Allowance for Expected Credit Losses Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Equity securities Equity securities Equity Securities [Member] Universal Life Universal Life [Member] Net amount at risk Market Risk Benefit, Net Amount at Risk Total liabilities Liabilities Subsidiary dividends paid to non-controlling interest shareholders Payments of Ordinary Dividends, Noncontrolling Interest Subtotal, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Proceeds Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Roar Roar Joint Venture, LLC [Member] Roar Joint Venture, LLC Mortality Multiplier Measurement Input Mortality Multiplier [Member] Measurement Input Mortality Multiplier Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Gross premiums Liability for Future Policy Benefit, Gross Premium Income F&G common stock offering Stock Issued During Period, Value, New Issues Other long-term investments Other Long-Term Investments [Member] Asset-backed securities ("ABS") Asset-backed securities Asset-Backed Securities [Member] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Consolidation Items [Axis] Consolidation Items [Axis] Indexed annuities/indexed universal life insurance ("IUL") embedded derivatives, included in Contractholder funds Indexed annuities/ IUL embedded derivatives, included in Contractholder funds Indexed annuities/IUL embedded derivatives Indexed Annuity, IUL Embedded Derivatives Liabilities In Contract Holder Funds [Member] Indexed Annuity, IUL Embedded Derivatives Liabilities In Contract Holder Funds Schedule of Balances and Changes in Contractholder Funds Policyholder Account Balance [Table Text Block] Investments in unconsolidated affiliates Unconsolidated Investments [Member] Unconsolidated Investments Counterparty Name [Axis] Counterparty Name [Axis] Gross investment income Gross Investment Income, Operating Market Risk Benefit [Table] Market Risk Benefit [Table] Available-for-sale embedded derivative Embedded Derivative, Other Long-term Investments, Available for Sale [Member] Embedded Derivative, Other Long-term Investments, Available for Sale F&G F&G [Member] F&G Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporates Corporates Corporate Debt Securities [Member] Other comprehensive loss attributable to non-controlling interest, tax expense (benefit) Other Comprehensive Income (Loss), Tax, Portion Attributable To Noncontrolling Interest, Spinoff Other Comprehensive Income (Loss), Tax, Portion Attributable To Noncontrolling Interest, Spinoff Collateral held Collateral Already Posted, Aggregate Fair Value