Short-term investments Other Short-Term Investments Consolidated Entities [Axis] Consolidated Entities [Axis] Variable Rate [Domain] Variable Rate [Domain] Less: Net (loss) earnings attributable to non-controlling interests Net income (loss) attributable to noncontrolling interest Losses of unconsolidated affiliates Net Income (Loss) Attributable to Noncontrolling Interest Entity Voluntary Filers Entity Voluntary Filers Statistical Measurement [Domain] Statistical Measurement [Domain] Aggregate borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Changes in assets and liabilities, net of effects from acquisitions: Increase (Decrease) in Operating Capital [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Investment, Name [Domain] Investment, Name [Domain] Impairment expense Impairment of Intangible Assets (Excluding Goodwill) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Number of restaurants Number of Restaurants Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Revolving Credit Facility Revolver Note Revolving Credit Facility [Member] Other long-term investments and noncurrent assets Investments and Other Noncurrent Assets Less: net earnings attributable to noncontrolling interest Preferred Stock Dividends and Other Adjustments Trade accounts payable Accounts Payable, Current Segment Reporting [Abstract] Segment Reporting [Abstract] CSI Computer Sciences, Inc [Member] Computer Sciences, Inc Investment, Name [Axis] Investment, Name [Axis] D&B shares received as partial consideration for the Optimal Blue Disposition Non Cash Investing, Shares Received, Partial Consideration for Investment Disposal, Amount Non Cash Investing, Shares Received, Partial Consideration for Investment Disposal, Amount Total other expense Nonoperating Income (Expense) Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Commitments and contingencies - see Note M Commitments and Contingencies Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Purchase Obligations Recorded Unconditional Purchase Obligations [Table Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Five Management fee, fixed annual amount Management Services Agreement, Management Fee, Fixed Annual Amount Management Services Agreement, Management Fee, Fixed Annual Amount Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Liability for insurance reserves Liability for Claims and Claims Adjustment Expense Income Taxes Income Tax Disclosure [Text Block] Other accrued liabilities Other Accrued Liabilities, Noncurrent Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Ownership [Axis] Ownership [Axis] Guarantor obligations, term Guarantor Obligations, Term Franchise and other Franchise And Other [Member] Franchise And Other [Member] Investment before adjustment for impairment Equity Method Investments Before Adjustment For Other Than Temporary Impairment Equity Method Investments Before Adjustment For Other Than Temporary Impairment Current liabilities: Liabilities, Current [Abstract] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Preferred stock, par or value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, $0.0001 par value; authorized 10,000,000 shares; issued and outstanding, none as of December 31, 2023 and December 31, 2022 Preferred Stock, Value, Issued Affiliate Elimination Intersegment Eliminations [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Additions to notes receivable Payments to Acquire Notes Receivable Proceeds from sales of VIBSQ, Legendary Baking and RCI Proceeds from Divestiture of Businesses Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Net loss per share (in usd per share) Earnings Per Share, Diluted Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Other Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Less: Treasury stock, 22,477,241 and 16,328,308 shares as of December 31, 2023 and December 31, 2022, respectively, at cost Treasury Stock, Value Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Level 3 Fair Value, Inputs, Level 3 [Member] Treasury stock, shares (in shares) Treasury Stock, beginning balance (in shares) Treasury Stock, ending balance (in shares) Treasury Stock, Common, Shares 2024 Recorded Unconditional Purchase Obligation, to be Paid, Year One Trading Symbol Trading Symbol Equity investment Payments to Acquire Equity Method Investments Interest, investment and other income Investment Income, Interest and Dividend Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Before tax gain reclassified from AOCI Other Comprehensive Income (Loss), Reclassification Adjustment From AOCI For Investment Transferred From Equity Method To Equity Securities, FV, Before Tax Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) of equity method investment transferred to equity securities FV NI. Net loss attributable to Cannae Holdings, Inc. common shareholders Net loss attributable to Alight Net loss attributable to System1 Net Income (Loss) Total current liabilities Current liabilities Liabilities, Current Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Consolidated and unconsolidated stock-based compensation Effective Income Tax Rate Reconciliation, Equity Method Investment Stock-based Compensation, Percent Effective Income Tax Rate Reconciliation, Equity Method Investment Stock-based Compensation, Percent Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Leases Lessee, Operating Leases [Text Block] Intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Deferred revenue (contract liabilities) Contract with Customer, Liability Management fee cost of invested capital (greater than) Management Fee Cost of Invested Capital, Minimum Amount Management Fee Cost of Invested Capital, Minimum Amount Investments without readily determinable fair value, impairment loss Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Schedule of Non-Amortizable Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Comprehensive Earnings Comprehensive Income, Policy [Policy Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Total deferred tax asset Deferred Tax Assets, Net of Valuation Allowance Guarantor obligations, maximum exposure Guarantor Obligations, Maximum Exposure, Undiscounted Purchases of short-term investment securities Payments to Acquire Short-Term Investments Goodwill Goodwill Goodwill Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Equity Components [Axis] Equity Components [Axis] Investment, measurement input Equity Method Investment, Measurement Input Equity Method Investment, Measurement Input Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] 2025 Long-Term Debt, Maturity, Year Two Dayforce Dayforce [Member] Dayforce Entity Small Business Entity Small Business Estimated amortization expense, 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Four Sightline Sightline Payments LLC [Member] Sightline Payments LLC Local Phone Number Local Phone Number Forecast Forecast [Member] Dividends declared (in usd per share) Common Stock, Dividends, Per Share, Declared Unrealized gain on investments and other financial instruments, net (excluding investments in unconsolidated affiliates) Other comprehensive earnings — unrealized gain on investments and other financial instruments, net of tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Lease liabilities, long-term Operating lease liability as of December 31, 2023, long-term Operating Lease, Liability, Noncurrent Proceeds from sale and maturity of short-term investment securities Proceeds from Sale, Maturity and Collection of Short-Term Investments Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Depreciation expense on property and equipment Depreciation Purchase of other long term investments Payments to Acquire Long-Term Investments 2027 Recorded Unconditional Purchase Obligation, to be Paid, Year Four Income Statement Location [Axis] Income Statement Location [Axis] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Agreement termination, base fee for termination of agreement from average annual management fee for preceding period as of termination date Base Fee For Termination Of Agreement Based Upon Average Annual Management Fee For Preceding Period As Of Termination Date, Amount Base Fee For Termination Of Agreement Based Upon Average Annual Management Fee For Preceding Period As Of Termination Date, Amount Line of Credit Facility [Table] Line of Credit Facility [Table] Schedule of Notes Payable Schedule of Long-Term Debt Instruments [Table Text Block] Purchase of shares (in shares) Purchase Of Equity Securities, Number of Shares Purchase Of Equity Securities, Number of Shares Proceeds from sale of D&B shares Proceeds From Sale Of Equity Method Investments, Four Proceeds From Sale Of Equity Method Investments, Four Shares withheld for taxes and in treasury Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Preferred shares received as consideration for note receivable from QOMPLX Non Cash Investing, Preferred Shares Received as Consideration For Note Receivable Non Cash Investing, Preferred Shares Received as Consideration For Note Receivable Goodwill and other intangible assets, net Goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Future Payments Under Operating Lease Arrangements Under ASC Topic 842 Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Schedule of Investments in Unconsolidated Affiliates and Summarized Financial Information Equity Method Investments [Table Text Block] Investment Commtment Investment Commtment [Member] Investment Commtment Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Sale of stock (in shares) Sale of Stock, Number of Shares Issued in Transaction Total revenues Total revenues and other income (expense) Revenues Payables and Accruals [Abstract] Payables and Accruals [Abstract] Senior Lien Senior Lien [Member] Base fee for termination of agreement due to third-party change of control Agreement Termination Due To Third-Party Change Of Control, Base Fee Agreement Termination Due To Third-Party Change Of Control, Base Fee Accounts Payable and Other Accrued Liabilities, Current and Long-term Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Product and Service [Domain] Product and Service [Domain] Other Other Notes Payable [Member] Other Notes Payable [Member] Proceeds from sale of AmeriLife Proceeds From Sale Of Equity Method Investments, Two Proceeds From Sale Of Equity Method Investments, Two Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Antidilutive shares excluded from calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income taxes receivable Income Taxes Receivable, Current Interest expense Interest Expense Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Other notes payable Notes Payable, Other Payables [Member] Property and equipment, gross Property, Plant and Equipment, Gross Lease assets recognized in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Related Party Transactions Related Party Transactions Disclosure [Text Block] Less: discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Management Estimates Use of Estimates, Policy [Policy Text Block] Net decrease in lease liabilities Increase (Decrease) In Lease Liabilities Increase (Decrease) In Lease Liabilities Schedule of Income Tax (Benefit) Expense on Continuing Operations Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Lien Category [Axis] Lien Category [Axis] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Proceeds from sales of Dayforce shares Proceeds From Sale Of Equity Method Investments, One Proceeds From Sale Of Equity Method Investments, One Entity File Number Entity File Number Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Discount Rate Measurement Input, Discount Rate [Member] Lease liabilities, current Less: operating lease liability as of December 31, 2023, current Operating Lease, Liability, Current 2026 Long-Term Debt, Maturity, Year Three Operating lease, number of options to renew Lessee, Operating Lease, Number Of Options To Renew Lessee, Operating Lease, Number Of Options To Renew Computer software Software Computer Software, Intangible Asset [Member] Management Services Agreement Management Services Agreement [Member] Management Services Agreement [Member] Auditor Firm ID Auditor Firm ID Lien Category [Domain] Lien Category [Domain] Amortization expense for amortizable intangible assets Amortization of Intangible Assets Entity Shell Company Entity Shell Company 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Stock repurchase, average price per share (in usd per share) Shares Acquired, Average Cost Per Share Net change in income taxes Increase (Decrease) in Income Taxes Payable Counterparty Name [Domain] Counterparty Name [Domain] 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 Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Asset Class [Axis] Asset Class [Axis] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Unconsolidated affiliates Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Operating lease cost Operating Lease, Cost Common stock, shares, issued (in shares) Common Stock, Shares, Issued Gross profit Gross Profit Deferred revenue Contract with Customer, Liability, Current Audit Firm [Line Items] Audit Firm [Line Items] Audit Firm Security Exchange Name Security Exchange Name Number of directors Number of Directors Number of Directors Total assets Assets, Fair Value Disclosure Long-term debt Notes payable, total Borrowings outstanding Long-Term Debt Stock-Based Compensation Plans Share-Based Payment Arrangement [Policy Text Block] Proceeds from sale of stock Sale of Stock, Consideration Received on Transaction Dividends received deduction Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent 2027 Long-Term Debt, Maturity, Year Four Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Option to increase limit Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Investments Investment, Policy [Policy Text Block] Total operating expenses Costs and Expenses Maximum Maximum [Member] Comprehensive loss attributable to Cannae Comprehensive Income (Loss), Net of Tax, Attributable to Parent Alight Alight, Inc. and FTAC Sponsor [Member] Alight, Inc. and FTAC Sponsor Document Type Document Type Basis difference in investments Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Payment Guarantee Payment Guarantee [Member] Federal Domestic Tax Authority [Member] Entity Address, Address Line One Entity Address, Address Line One Treasury stock repurchases Stock repurchases Treasury Stock, Value, Acquired, Cost Method Thereafter Long-Term Debt, Maturity, after Year Five Inventory Inventory, Policy [Policy Text Block] Maximum Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Ownership interest, controlling interest Subsidiary, Ownership Percentage, Parent Revaluation of retained investment, gain Equity Method Investment, Realized Gain (Loss) on Disposal Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Trademarks and tradenames Trademarks and Trade Names [Member] Subsequent Event Subsequent Event [Member] Operating loss carryforwards Operating Loss Carryforwards Insurance Reserves Self Insurance Reserve [Policy Text Block] Owned investment (in shares) Investment Owned, Balance, Shares Schedule of Amortizable Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Accounts payable and other accrued liabilities, long term Accounts Payable and Accrued Liabilities, Noncurrent [Abstract] Income Statement [Abstract] Income Statement [Abstract] 2026 Recorded Unconditional Purchase Obligation, to be Paid, Year Three Title of 12(b) Security Title of 12(b) Security Litigation settlement, amount awarded from other party Litigation Settlement, Amount Awarded from Other Party Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Non-deductible executive compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Executive Compensation, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Executive Compensation, Percent Related Party [Domain] Related Party, Type [Domain] Subsidiary distributions paid to noncontrolling interest shareholders Payments of Ordinary Dividends, Noncontrolling Interest Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Operating Segments Operating Segments [Member] Other current assets Other Assets, Current Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Unrealized gain on investments and other financial instruments, tax expense OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Entity Tax Identification Number Entity Tax Identification Number Other Commitments [Domain] Other Commitments [Domain] Investments in unconsolidated affiliates Equity investment Equity Method Investments FNF Revolver Corporate Revolver Note Corporate Revolver Note [Member] Corporate Revolver Note [Member] Land Land [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Notes Payable Long-Term Debt [Text Block] Advertising Costs Advertising Cost [Policy Text Block] Agreement termination fee, annual installments Management Services Agreement, Annual Installment Of Termination Fee, Amount Management Services Agreement, Annual Installment Of Termination Fee, Amount Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Purchases of treasury stock Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-Known Seasoned Issuer Entity Well-known Seasoned Issuer Segments [Domain] Segments [Domain] Variable interest entity, not primary beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Consolidation Items [Domain] Consolidation Items [Domain] JANA Funds JANA Funds [Member] JANA Funds Retained earnings Retained Earnings (Accumulated Deficit) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Issuance of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Equity investments Effective Income Tax Rate Reconciliation, Equity Investments, Percent Effective Income Tax Rate Reconciliation, Equity Investments, Percent Proceeds from Optimal Blue Disposition, cash portion Proceeds From Sale Of Equity Method Investments, Three Proceeds From Sale Of Equity Method Investments, Three Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Partnerships Deferred Tax Assets, Deferred Expense, Partnerships Deferred Tax Assets, Deferred Expense, Partnerships Current assets: Assets, Current [Abstract] Alight Alight, Inc. [Member] Alight, Inc. Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Leases [Abstract] Leases [Abstract] Advertising costs incurred Advertising Expense Equity securities, fair value Equity Securities, FV-NI Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Deferred tax assets: Components of Deferred Tax Assets [Abstract] Schedule of Significant Components of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Entity Address, State or Province Entity Address, State or Province Counterparty Name [Axis] Counterparty Name [Axis] Franchise rights Franchise Rights [Member] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Estimated amortization expense, 2024 Finite-Lived Intangible Asset, Expected Amortization, Year One Operating leases Operating Lease, Payments Common stock, shares, outstanding (in shares) Beginning balance, Common Stock (in shares) Ending balance, Common Stock (in shares) Common Stock, Shares, Outstanding Lease asset impairment Operating Lease, Impairment Loss Unrealized (loss) gain relating to investments in unconsolidated affiliates Other comprehensive earnings — unrealized earnings (losses) on investments in unconsolidated affiliates, net of tax OCI, Equity Method Investment, after Tax Auditor Location Auditor Location Other operating expenses, including asset impairments Other operating expense, management fees and interest payable Other Cost and Expense, Operating Condensed Combined Balance Sheets Equity Method Investment, Summarized Financial Information [Abstract] Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Member] BKFE BKFE Black Knight Football and Entertainment LP [Member] Black Knight Football and Entertainment LP Percentage of ownership after sale of stock transaction Sale of Stock, Percentage of Ownership after Transaction Unrealized (loss) gain relating to investments in unconsolidated affiliates, tax (benefit) expense OCI, Equity Method Investment, Tax Net (loss) earnings Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Asset Class [Domain] Asset Class [Domain] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Management Fee Expense Payable Management Fee Expense Payable [Member] Management Fee Expense Payable Par value per share (in usd per share) Common Stock, Par or Stated Value Per Share Sale of Stock [Axis] Sale of Stock [Axis] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Reclassification of unrealized gains on investments and other financial instruments, tax benefit Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Equity securities: Equity Securities, FV-NI, Current Net loss Net Income (Loss) Available to Common Stockholders, Basic Debt Instrument [Axis] Debt Instrument [Axis] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Total operating lease liability as of December 31, 2023, at present value Operating Lease, Liability Measurement Input Type [Domain] Measurement Input Type [Domain] Credit Facility [Axis] Credit Facility [Axis] Gross Principal Maturities Based Upon Contractual Maturities of Notes Payable Schedule of Maturities of Long-Term Debt [Table Text Block] Total liabilities Total liabilities Liabilities Current (benefit) expense Current Income Tax Expense (Benefit) Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Accumulated Other Comp (Loss) Earnings AOCI Attributable to Parent [Member] Sightline Sightline [Member] Sightline Property and Equipment Property, Plant and Equipment Disclosure [Text Block] CNNE Cannae Holdings Inc. [Member] Cannae Holdings Inc. [Member] Cost of restaurant revenue Cost of Restaurant Revenue [Member] Cost of Restaurant Revenue [Member] Restaurant Group Restaurant Group [Member] Restaurant Group [Member] Accounts Payable and Other Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Reclassification of unrealized losses on investments in 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 loss Other Comprehensive (Income) Loss, Reclassification Adjustment For Net Unrealized (Gains) Losses On Unconsolidated Affiliates And Other Investment Included In Net Earnings, Net Of Tax Other Comprehensive (Income) Loss, Reclassification Adjustment For Net Unrealized (Gains) Losses On Unconsolidated Affiliates and Other Investments Included In Net Earnings, Net of Tax Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Related Party Transaction [Domain] Related Party Transaction [Domain] Earnings per share Earnings Per Share [Abstract] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Cannae common stock, $0.0001 par value; authorized 115,000,000 shares as of December 31, 2023 and December 31, 2022; issued of 92,844,329 and 92,583,280 shares as of December 31, 2023 and December 31, 2022, respectively; and outstanding of 70,367,088 and 76,254,972 shares as of December 31, 2023 and December 31, 2022, respectively Common Stock, Value, Issued Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Tradenames Trade Names [Member] Lease asset amortization Operating Lease, Right-of-Use Asset, Periodic Reduction Investments in unconsolidated affiliates Equity Method Investments [Member] Customer relationships and contracts Customer Relationships And Contracts [Member] Customer Relationships And Contracts [Member] Total current assets Total current assets Assets, Current Interest and investment income, including recognized gains (losses), net Investment Income, Net Trade receivables, net Accounts Receivable, after Allowance for Credit Loss Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Cash paid during the year: Supplemental Cash Flow Information [Abstract] Entity Filer Category Entity Filer Category Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Depreciation and amortization Cost, Depreciation and Amortization Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Schedule of Reconciliation of Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Investment in Sightline Payments To Acquire Equity Method Investments, Two Payments To Acquire Equity Method Investments, Two Management Fee payable Management Fee Payable, Current Management Fee Payable, Current Unrecognized tax benefits Unrecognized Tax Benefits Income Tax Authority [Axis] Income Tax Authority [Axis] Shares held as security for credit facility (in shares) Common Stock Held As Collateral for Credit Facility, Shares Common Stock Held As Collateral for Credit Facility, Shares Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Estimated amortization expense, 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Five Buildings Building [Member] Services agreement, term Management Services Agreement, Term Management Services Agreement, Term Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Trade Receivables Accounts Receivable [Policy Text Block] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Effective tax rate excluding equity investments Effective Income Tax Rate, Excluding Effective Tax Rate, ContinuingOperations Effective Income Tax Rate, Excluding Effective Tax Rate, ContinuingOperations 2020 Margin Facility 2020 Margin Facility [Member] 2020 Margin Facility Other accrued liabilities Other Accrued Liabilities, Current Bakery sales Bakery Sales [Member] Bakery Sales [Member] Agreement termination, preceding period Agreement Termination, Base Fee Reduction From Average Annual Management Fee For Preceding Period As Of Termination Date Agreement Termination, Base Fee Reduction From Average Annual Management Fee For Preceding Period As Of Termination Date Depreciation and amortization Depreciation, Depletion and Amortization Recognized losses and impairments of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Furniture, fixtures and equipment Furniture and Fixtures [Member] Interest rate incurred Debt Instrument, Interest Rate, Stated Percentage Accounts payable and other accrued liabilities, current Accounts payable and other accrued liabilities, current Accounts Payable and Accrued Liabilities, Current Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Total Cannae shareholders' equity Equity, Attributable to Parent Indefinite-Lived Intangible Assets Indefinite-Lived Intangible Assets [Member] Consolidation Items [Axis] Consolidation Items [Axis] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Total purchase commitments Recorded Unconditional Purchase Obligation Goodwill impairment Goodwill, Impairment Loss Less: valuation allowance Deferred Tax Assets, Valuation Allowance Restaurant revenue Restaurant Sales [Member] Restaurant Sales [Member] Revenue recognized Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Purchases of investments in unconsolidated affiliates and other investments Payments to Acquire Equity Method Investments And Other Investments Payments to Acquire Equity Method Investments And Other Investments Proceeds from sale of CorroHealth Proceeds From Sale Of Equity Method Investments, Five Proceeds From Sale Of Equity Method Investments, Five Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Investment without readily determinable fair value Equity Securities without Readily Determinable Fair Value, Amount Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Level 2 Fair Value, Inputs, Level 2 [Member] Difference between equity ownership interest and underlying equity in net assets Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Entity Emerging Growth Company Entity Emerging Growth Company Other operating revenue Total other operating revenue Total Other Operating Revenue [Member] Total Other Operating Revenue [Member] Based on quoted market prices, aggregate fair value of ownership Equity Method Investment, Quoted Market Value Additions to property and equipment and other intangible assets Payments to Acquire Productive Assets O'Charley's O'Charley's [Member] O'Charley's [Member] Investment in Alight, net of subscription fees earned Payment for shares Payments to Acquire Equity Securities, FV-NI Other intangible assets, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Total gross deferred tax asset Deferred Tax Assets, Gross Recognized losses, net Nonoperating Gains (Losses) Variable rate interest Debt Instrument, Interest Rate, Effective Percentage Paysafe Paysafe Paysafe [Member] Paysafe Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Net loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Number of distributors Number Of Distributors Number Of Distributors Document Fiscal Period Focus Document Fiscal Period Focus 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Intangible assets, useful lives Finite-Lived Intangible Asset, Useful Life Investment, ownership percentage Investment Owned, Ownership Percentage Investment Owned, Ownership Percentage Amount available to borrow Line of Credit Facility, Remaining Borrowing Capacity 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Stock-based compensation cost Share-Based Payment Arrangement, Noncash Expense Non-cash carried interest expense Paid-in-Kind Interest Short-term investments Short-term Investments At Fair Value Short-term Investments At Fair Value Common Stock Common Stock [Member] Cost of restaurant revenue Other Cost of Operating Revenue Audit Information [Abstract] Audit Information [Abstract] Audit Information Stock repurchase program, period Stock Repurchase Program, Period in Force City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Product and Service [Axis] Product and Service [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Valuation Technique, Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Ownership (as a percent) Ownership interest, equity method investment (as a percent) Ownership (as a percent) Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus Total equity Beginning balance Ending balance Total equity Equity, Including Portion Attributable to Noncontrolling Interest Subsidiary dividends paid to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Services agreement, automatic renewal terms Management Services Agreement, Renewal Term Management Services Agreement, Renewal Term Lease terms Lessee, Operating Lease, Term of Contract Minimum Minimum [Member] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Share Repurchase Program [Domain] Share Repurchase Program [Domain] Distributions from investments in unconsolidated affiliates Proceeds from Equity Method Investment, Distribution Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Tax liabilities, excluding income taxes payable Accrual for Taxes Other than Income Taxes, Current ASSETS Assets [Abstract] Reclassification of unrealized losses on investments in unconsolidated affiliates, tax benefit Other Comprehensive (Income) Loss, Reclassification Adjustment For Net Unrealized (Gains) Losses On Unconsolidated Affiliated Included In Net Earnings,Tax Other Comprehensive (Income) Loss, Reclassification Adjustment For Net Unrealized (Gains) Losses On Unconsolidated Affiliated Included In Net Earnings, Tax Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Borrowings, net of debt issuance costs Proceeds from Issuance of Long-Term Debt Accrued casualty self-insurance expenses Accrued Insurance, Current Payment for shares withheld for taxes and in treasury Payment, Tax Withholding, Share-Based Payment Arrangement Term of automatic extension Debt Instrument, Term Of Automatic Extension Debt Instrument, Term Of Automatic Extension Other Deferred Tax Assets, Other Equity securities, at fair value Equity Securities, FV-NI, Noncurrent Net loss Net loss Net earnings (loss) Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income taxes Income Taxes Paid, Net Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Deferred tax assets Deferred Income Tax Assets, Net Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Other Other Products And Services [Member] Other Products And Services [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Net other investing activities Payments for (Proceeds from) Other Investing Activities Retained Earnings Retained Earnings [Member] Notes payable, current Less: Notes payable, current Long-Term Debt, Current Maturities Total liabilities and equity Liabilities and Equity Other noncurrent assets Other assets Other Assets, Noncurrent Other income (expense): Nonoperating Income (Expense) [Abstract] Ownership [Domain] Ownership [Domain] 2022 Repurchase Program 2022 Repurchase Program [Member] 2022 Repurchase Program Net loss per share (in usd per share) Earnings Per Share, Basic Lease assets Operating Lease, Right-of-Use Asset Audit Firm [Table] Audit Firm [Table] Audit Firm Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Sale of Stock [Domain] Sale of Stock [Domain] Accounts payable and other accrued liabilities, current Accounts Payable and Accrued Liabilities, Current [Abstract] JANA JANA [Member] JANA Total equity Members' Equity Entity Address, City or Town Entity Address, City or Town Related Party Related Party [Member] Summary of Financial Information Concerning Reportable Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Document Transition Report Document Transition Report Investment in Paysafe, net of subscription fees earned Payments To Acquire Stock Subscription Agreement, Net of Fees Payments To Acquire Stock Subscription Agreement, Net of Fees Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Developed technology Technology-Based Intangible Assets [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Collections of notes receivable Proceeds from Collection of Notes Receivable Exchange of directly held Alight warrants for Alight common stock Non Cash Investing Activities, Receivable From Divestiture Of Business Receivable From Divestiture Of Business Repayments of line of credit Repayments of Lines of Credit CSI LP CSI LP Partnership [Member] CSI LP Partnership Entity Public Float Entity Public Float 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] System1 System1 [Member] System1 Net gains (losses) recognized during the period on equity securities Equity Securities, FV-NI, Gain (Loss) Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Total Long-Term Debt, Gross Adjustments to reconcile net (loss) earnings to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Amended Management Services Agreement Amended Management Services Agreement [Member] Amended Management Services Agreement Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Less: Comprehensive (loss) earnings attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Other Commitments [Axis] Other Commitments [Axis] Additional paid-in capital Additional Paid in Capital Tender Offer Tender Offer [Member] Tender Offer Deferred benefit Deferred Income Tax Expense (Benefit) Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Loss before equity in (losses) 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 Accounts payable and other accrued liabilities, long-term Accounts payable and other accrued liabilities, long term Accounts Payable and Accrued Liabilities, Noncurrent Thereafter Recorded Unconditional Purchase Obligation, to be Paid, after Year Five Supplementary Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Estimated amortization expense, 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three 99 Restaurants Ninety-Nine Restaurants [Member] Ninety-Nine Restaurants [Member] Distributions from Unconsolidated Affiliates Equity Method Investments [Policy Text Block] Distributions from investments in unconsolidated affiliates Dividends from investment in unconsolidated affiliate Distribution from investment Proceeds from Equity Method Investment, Distribution, Return of Capital 2024 Long-Term Debt, Maturity, Year One Management fee rate Management and Service Fees, Rate Related Party [Axis] Related Party, Type [Axis] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other Current Assets Prepaid Expenses and Other Current Assets Policy [Policy Text Block] Prepaid Expenses and Other Current Assets Policy Entity Registrant Name Entity Registrant Name Net (increase) decrease in other assets Increase (Decrease) in Other Operating Assets Estimated amortization expense, 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two Less: net gains (losses) recognized during the period on equity securities sold or transferred during the period Equity Securities, FV-NI, Unrealized Gain (Loss) Stock issued for minority interest investment (in shares) Stock Issued During Period, Shares, Acquisitions Proceeds from the sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Noncontrolling interests Equity, Attributable to Noncontrolling Interest Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Auditor Name Auditor Name Agreement termination fee annual installments, payment period Management Services Agreement, Termination Fee Annual Installments, Payment Period Management Services Agreement, Termination Fee Annual Installments, Payment Period Document Period End Date Document Period End Date Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Corporate and Other Corporate and Other Corporate and Other [Member] Debt service payments Repayments of Long-Term Debt 2025 Recorded Unconditional Purchase Obligation, to be Paid, Year Two Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Non-cash investing and financing activities: Non Cash Investing Activities [Abstract] Non Cash Investing Activities [Abstract] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Concentration of Risk Concentration Risk Disclosure [Text Block] Amortizable intangible assets, gross Finite-Lived Intangible Assets, Gross Income tax benefit Income tax (benefit) expense Income tax (benefit) Income Tax Expense (Benefit) Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Income Tax Authority [Domain] Income Tax Authority [Domain] Other than temporary impairment of investment Equity Method Investment, Other than Temporary Impairment Accrued payroll and employee benefits Employee-related Liabilities, Current Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Fair Value Measurements Fair Value Disclosures [Text Block] Restaurant Group financing obligations Other Financing Obligations, Noncurrent Other Financing Obligations, Noncurrent Impairment to property plant and equipment Impairment of Long-Lived Assets to be Disposed of Valuation allowance for state NOLs Operating Loss Carryforwards, Valuation Allowance Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Reclassification of unrealized gains on investments and other financial instruments, net of tax, included in net earnings 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 Operating lease weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Total operating revenues Revenues from external customers Revenue from Contract with Customer, Excluding Assessed Tax Entity [Domain] Entity [Domain] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag High Sierra Distillery, LP, Minden Mill High Sierra Distillery, LP, Minden Mill [Member] High Sierra Distillery, LP, Minden Mill Other Intangible Assets Intangible Assets Disclosure [Text Block] Legal Entity [Axis] Legal Entity [Axis] Customer relationships Customer-Related Intangible Assets [Member] Other Long-Term Investments and Non-Current Assets Investments and Other Noncurrent Assets [Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Shares withheld for taxes and in treasury (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Lease weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Condensed Combined Statements of Operations Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Credit Facility [Domain] Credit Facility [Domain] Treasury stock repurchases (in shares) Stock repurchases (in shares) Treasury Stock, Shares, Acquired Proceeds from other sales of investments in unconsolidated affiliates, equity securities and other long- term investments Proceeds from Sale of Other Investments Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Property and equipment, useful lives Property, Plant and Equipment, Useful Life Notes payable, long-term Notes payable, long-term Long-Term Debt, Excluding Current Maturities Valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Leasehold improvements Leasehold Improvements [Member] Deferred Tax Liabilities Deferred Income Tax Liabilities, Net [Member] Deferred Income Tax Liabilities, Net Schedule of (Losses) Gains on Securities Gain (Loss) on Securities [Table Text Block] Weighted average shares outstanding Cannae Holdings common stock, diluted basis (in shares) Weighted Average Number of Shares Outstanding, Diluted Other Other Investments In Unconsolidated Affiliates [Member] Other Investments In Unconsolidated Affiliates [Member] Commitment to invest Other Commitment Contract Balances, Receivables and Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Operating expenses: Operating Expenses [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Additional Paid-in Capital Additional Paid-in Capital [Member] Document Annual Report Document Annual Report Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date Equity Securities, FV-NI, Realized Gain (Loss) Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total assets Assets Assets Equity in (losses) earnings of unconsolidated affiliates Equity in losses (earnings) of unconsolidated affiliates Equity in (losses) earnings of unconsolidated affiliates Income (Loss) from Equity Method Investments Share Repurchase Program [Axis] Share Repurchase Program [Axis] Cover [Abstract] Cover [Abstract] 2028 Recorded Unconditional Purchase Obligation, to be Paid, Year Five Noncontrolling interests Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 2028 Long-Term Debt, Maturity, Year Five Personnel costs Labor and Related Expense Dun & Bradstreet Dun & Bradstreet Dun And Bradstreet Corporation [Member] Dun And Bradstreet Corporation [Member] Other non-current liabilities Other liabilities Other Liabilities, Noncurrent Total lease payments, undiscounted Lessee, Operating Lease, Liability, to be Paid Schedule of Supplemental Cash Flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Loss before income taxes and equity in (losses) earnings of unconsolidated affiliates Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Lease renewal term Lessee, Operating Lease, Renewal Term Equity Component [Domain] Equity Component [Domain] State State and Local Jurisdiction [Member] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Debt Instrument [Line Items] Debt Instrument [Line Items] Scenario [Axis] Scenario [Axis] Weighted average shares outstanding Cannae Holdings common stock, basic basis (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Operating loss Operating income Operating loss Operating Income (Loss) Other Property, Plant and Equipment, Other Types [Member] Net decrease in accounts payable, accrued liabilities, deferred revenue and other Increase (Decrease) In Accounts Payable, Accrued Liabilities, Deferred Revenue, And Other Operating Liabilities Increase (Decrease) In Accounts Payable, Accrued Liabilities, Deferred Revenue, And Other Operating Liabilities Revenues: Revenues [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] 2023 Repurchase Program 2023 Repurchase Program [Member] 2023 Repurchase Program Related Party Transaction [Axis] Related Party Transaction [Axis] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Property and Equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Other comprehensive (loss) earnings, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Scenario [Domain] Scenario [Domain] Line of credit outstanding balance Long-Term Line of Credit Underwritten Secondary Public Offering Underwritten Secondary Public Offering [Member] Underwritten Secondary Public Offering [Member] Investment in System1 Payments To Acquire Equity Method Investments, One Payments To Acquire Equity Method Investments, One Carried Interest Expense Related to Sales of and Distributions from Investments Carried Interest Expense Related to Sales of and Distributions from Investments [Member] Carried Interest Expense Related to Sales of and Distributions from Investments Real estate and resort Real Estate And Resort [Member] Real Estate And Resort [Member] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stock repurchase program, number of shares authorized to be repurchased (up to) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Non-controlling Interests Noncontrolling Interest [Member] Loss from discontinued operations, net of taxes Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent