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Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Investment owned, warrants to purchase common shares (in shares) Investment Owned, Balance, Warrants to Purchase Common Shares, Shares Investment Owned, Balance, Warrants to Purchase Common Shares, Shares Financial Instrument [Axis] Financial Instrument [Axis] Common stock, dividends declared (in usd per share) Common Stock, Dividends, Per Share, Declared Total operating revenues Total operating revenues Revenues from external customers Revenue from Contract with Customer, Excluding Assessed Tax Alight/FTAC Sponsor Alight/FTAC Sponsor Alight, Inc. and FTAC Sponsor [Member] Alight, Inc. and FTAC Sponsor Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Management Fee Expense , Interest Payable Management Fee Expense , Interest Payable [Member] Management Fee Expense , Interest Payable Consolidation Items [Domain] Consolidation Items [Domain] Fair Value Hierarchy 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[Member] Paysafe Warrants Guarantee of all borrowers obligations, period (up to) Guarantee of All Borrowers Obligations, Maximum Period Guarantee of All Borrowers Obligations, Maximum Period 2026 Recorded Unconditional Purchase Obligation, to be Paid, Year Four Related Party Transaction [Axis] Related Party Transaction [Axis] Issuance of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Income tax expense (benefit) Income tax (benefit) expense Income Tax Expense (Benefit) Total equity Beginning balance Ending balance Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Other Commitments [Domain] Other Commitments [Domain] O'Charley's and Restaurant Growth Services, LLC O'Charley's and Restaurant Growth Services, LLC [Member] O'Charley's and Restaurant Growth Services, LLC Borrowings Proceeds from Issuance of Long-term Debt Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures 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Reclassification adjustments for unrealized gains and losses on investments and other financial instruments, net of tax, (excluding investments in unconsolidated affiliates) included in net earnings Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other noncurrent assets: Other Assets, Noncurrent, Fair Value Other Assets, Noncurrent, Fair Value Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Entity Tax Identification Number Entity Tax Identification Number Purchase Obligations Recorded Unconditional Purchase Obligations [Table Text Block] Basic Earnings Per Share, Basic [Abstract] Thereafter Long-Term Debt, Maturity, after Year Four Long-Term Debt, Maturity, after Year Four Stock Conversion Description [Axis] Stock Conversion Description [Axis] Corporate and Other Corporate and Other 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balance, Common Stock (in shares) Ending balance, Common Stock (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Shares converted, ratable portion, shares (in shares) Equity Method Investment, Shares Converted, Shares Equity Method Investment, Shares Converted, Shares Percentage of ownership after sale of stock transaction Sale of Stock, Percentage of Ownership after Transaction Recognized losses and asset impairments, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Cost of restaurant revenue Cost of Goods and Services Sold Revenues: Revenues [Abstract] Cash proceeds from sales of VIBSQ, Legendary Baking, and RCI Proceeds from Divestiture of Businesses Stock repurchase program, number of shares authorized to be repurchased (up to) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Proceeds from sale of investments in unconsolidated affiliates and other long term investments Proceeds from Sale of Other Investments Forward purchase agreement, commitment to purchase, shares (in shares) Forward Purchase Agreement, Commitment to Purchase, Shares Forward Purchase Agreement, Commitment to Purchase, Shares Subscription agreement, commitment to purchase Subscription Agreement, Commitment to Purchase, Shares, Value Subscription Agreement, Commitment to Purchase, Shares, Value Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Commitment to purchase limited partner interest Other Commitment, Investment, Limited Partnership Agreement Other Commitment, Investment, Limited Partnership Agreement Sightline Sightline Sightline Payments LLC [Member] Sightline Payments LLC Loss Contingencies [Line Items] Loss Contingencies [Line Items] Property and equipment, net Property, Plant and Equipment, Net Other non-current liabilities Other Liabilities, Noncurrent Related Party Transactions Related Party Transactions [Policy Text Block] Related Party Transactions Schedule of Notes Payable Schedule of Long-term Debt Instruments [Table Text Block] Treasury stock repurchases (in shares) Treasury Stock, Shares, Acquired Debt Instrument [Line Items] Debt Instrument [Line Items] Net valuation gain included in other comprehensive earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Debt service payments Repayments of Long-term Debt Earnings per share Earnings Per Share [Abstract] Reclassification adjustments for unrealized gains and losses of unconsolidated affiliates, net of tax, included in net earnings, tax expense Other Comprehensive Income Loss Reclassification Adjustment For Net Unrealized Gains Losses On Unconsolidated Affiliates, Net Of Tax, Include Net Earnings. Tax Other Comprehensive Income Loss Reclassification Adjustment For Net Unrealized Gains Losses On Unconsolidated Affiliates, Net Of Tax, Include Net Earnings. Tax Less: net gains (losses) recognized during the period on equity securities sold or transferred during the period Equity Securities, FV-NI, Unrealized Gain (Loss) Related Party Transaction [Domain] Related Party Transaction [Domain] Document Quarterly Report Document Quarterly Report Total revenues Total revenues, other income and realized gains (losses), net Revenues Net (increase) decrease in other assets Increase (Decrease) in Other Operating Assets CorroHealth CorroHealth [Member] CorroHealth Line of Credit Facility [Table] Line of Credit Facility [Table] Cash proceeds from settlement of fixed maturity securities and equity in Colt Proceeds from Sale of Debt Securities, Available-for-sale Other long term investments and non-current assets Investments and Other Noncurrent Assets Other Commitments [Line Items] Other Commitments [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Paysafe Paysafe [Member] Paysafe Notes payable, long term Notes payable, long term Long-term Debt, Excluding Current Maturities Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Effective tax rate Effective Income Tax Rate Reconciliation, Percent Lien Category [Axis] Lien Category [Axis] Personnel costs Labor and Related Expense Net earnings (loss) Net earnings (loss) Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Acquisition Loan Notes Payable To Banks, Acquisition Loan [Member] Notes Payable To Banks, Acquisition Loan [Member] Other Other Products And Services [Member] Other Products And Services [Member] Counterparty Name [Axis] Counterparty Name [Axis] Forward purchase agreement, investment commitment Forward Purchase Agreement, Commitment To Purchase Equity Interests Forward Purchase Agreement, Commitment To Purchase Equity Interests Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Ceridian Ceridian [Member] Ceridian [Member] Sale of stock (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Owned investment (in shares) Investment Owned, Balance, Shares Condensed Consolidated Statements of Comprehensive Earnings Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Entity Central Index Key Entity Central Index Key Security Exchange Name Security Exchange Name Subscription Agreement, Partnership Interest, CSI LP Subscription Agreement, Partnership Interest, CSI LP [Member] Subscription Agreement, Partnership Interest, CSI LP Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Weighted average shares outstanding Cannae Holdings common stock, diluted basis (in shares) Weighted Average Number of Shares Outstanding, Diluted Fair value, beginning of period Fair value, end of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Athletic Football Club Bournemouth Athletic Football Club Bournemouth [Member] Athletic Football Club Bournemouth Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax AmeriLife AmeriLife [Member] AmeriLife Collections of notes receivable Proceeds from Collection of Notes Receivable Fidelity National Financial Inc. Fidelity National Financial Inc. [Member] Fidelity National Financial Inc. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Interest rate basis Debt Instrument, Basis Spread on Variable Rate 2024 Recorded Unconditional Purchase Obligation, to be Paid, Year Two Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Other income (expense): Nonoperating Income (Expense) [Abstract] Other Other Notes Payable [Member] Other Notes Payable [Member] Investment in System1 and additional investments in unconsolidated affiliates Payments to Acquire Equity Method Investments Credit Facility [Axis] Credit Facility [Axis] Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Changes in assets and liabilities, net of effects from acquisitions: Increase (Decrease) in Operating Capital [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Principles of Consolidation and Basis of Presentation Consolidation, Policy [Policy Text Block] Reclassification adjustments for unrealized gains and losses of unconsolidated affiliates, net of tax, included in net earnings Reclassification adjustments for unrealized gains and losses on unconsolidated affiliates, net of tax, included in net earnings (loss) Other Comprehensive Income Loss Reclassification Adjustment For Net Unrealized Gains Losses On Unconsolidated Affiliates, Net Of Tax, Include Net Earnings Other Comprehensive Income Loss Reclassification Adjustment For Net Unrealized Gains Losses On Unconsolidated Affiliates, Net Of Tax, Include Net Earnings Total current liabilities Current liabilities Liabilities, Current Affiliate Elimination Intersegment Eliminations [Member] Lien Category [Domain] Lien Category [Domain] Forward Purchase Agreements Forward Purchase Agreements [Member] Forward Purchase Agreements Aggregate borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Ownership [Domain] Ownership [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Underwritten Secondary Public Offering Underwritten Secondary Public Offering [Member] Underwritten Secondary Public Offering [Member] Amortization of difference between book value of investment and ratable portion of equity in net assets Equity Method Investment, Amortization Of Difference Between Carrying Amount And Underlying Equity Equity Method Investment, Amortization Of Difference Between Carrying Amount And Underlying Equity Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Title of 12(b) Security Title of 12(b) Security AAII Warrants Austerlitz II Warrants Austerlitz II Warrants [Member] Austerlitz II Warrants Statement [Table] Statement [Table] Other current assets Other Assets, Current Investment commitment to provide line of credit facility (up to) Equity Method Investment, Commitment, Line of Credit Facility, Maximum Borrowing Capacity Equity Method Investment, Commitment, Line of Credit Facility, Maximum Borrowing Capacity Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Option to increase limit Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Other Commitments [Axis] Other Commitments [Axis] 2020 Margin Facility 2020 Margin Facility [Member] 2020 Margin Facility Goodwill Goodwill [Member] Limited Partnership Agreement, Black Knight Football and Entertainment Limited Partnership Agreement, Black Knight Football and Entertainment [Member] Limited Partnership Agreement, Black Knight Football and Entertainment Statistical Measurement [Axis] Statistical Measurement [Axis] Subsequent Event Subsequent Event [Member] Cover [Abstract] Cover [Abstract] Goodwill Goodwill Goodwill Brasada Interstate Loans Brasada Credit Agreement Brasada Credit Agreement [Member] Brasada Credit Agreement [Member] Total purchase commitments Recorded Unconditional Purchase Obligation Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest 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] Restaurant revenue Restaurant sales Restaurant Sales [Member] Restaurant Sales [Member] Net (loss) earnings from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income taxes payable Accrued Income Taxes, Current Scenario [Domain] Scenario [Domain] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Purchase of AAII Warrants Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Number of installment payments expected Number of Installment Payments For Equity Method Investments Number of Installment Payments For Equity Method Investments