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Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Foreign Current Foreign Tax Expense (Benefit) Goodwill Goodwill [Roll Forward] Revenue Disposal Group, Including Discontinued Operation, Revenue Denominator for earnings per share - weighted average shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Term Loan A Facility Term Loan A Facility [Member] Term Loan A Facility Selling and marketing expense Selling and Marketing Expense [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Net earnings (loss) Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Shares authorized for issuance (in shares) Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance Stated term (in years) Term Of Share-Based Compensation Plan Loss related to the allocation of a disputed gain on a real estate transaction Loss related to the allocation of a disputed gain on a real estate transaction Loss Contingency, Loss in Period State Current State and Local Tax Expense (Benefit) LONG-TERM DEBT Long-Term Debt [Text Block] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Adjustment of noncontrolling interests to redemption amount Temporary Equity, Accretion to Redemption Value Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] INCOME TAXES Income Tax Disclosure [Text Block] Balance at January 1 Balance at December 31 Accounts Receivable, Allowance for Credit Loss Common Stock, $0.0001 par value; authorized 1,600,000 shares; 83,581 and 84,831 shares issued and 71,555 and 80,481 shares outstanding at December 31, 2025 and 2024, respectively Common Stock, $0.0001 par value Common Stock Common Class A [Member] U.K. UNITED KINGDOM Short-term lease cost Short-Term Lease, Cost Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Term of options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Operating lease liabilities Increase (Decrease) in Operating Lease Liability Total shareholders’ equity Balance at beginning of period Balance at end of period Equity, Including Portion Attributable to Noncontrolling Interest Stock repurchased (in USD per share) Shares Acquired, Average Cost Per Share Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] Document Type Document Type Investment in MGM Equity Method Investments, Fair Value Disclosure Level 3 Fair Value, Inputs, Level 3 [Member] EARNINGS (LOSS) PER SHARE Earnings Per Share [Text Block] Withholding rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Withholding Rate Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Withholding Rate Gain on amendment of lease Gain (Loss) On Amendment Of Lease Gain (Loss) On Amendment Of Lease Subscription revenue Subscription [Member] Subscription Product and Service [Axis] Product and Service [Axis] Carrying amount of indefinite-lived intangible assets for which excess of fair value over carrying value is less than 20% Carrying Amount of Indefinite-Lived Intangible Assets for which Excess of Fair Value over Carrying Value is Less than 20% Carrying Amount of Indefinite-Lived Intangible Assets for which Excess of Fair Value over Carrying Value is Less than 20% Variable lease expense Variable Lease, Cost Revenue Revenue from Contract with Customer, Excluding Assessed Tax Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Loss contingency accrual Loss Contingency Accrual Indefinite-lived Intangible Assets Indefinite-Lived Intangible Assets [Member] Non-deductible transaction costs Effective Income Tax Rate Reconciliation, Nondeductible Expense, Transaction Costs, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Transaction Costs, Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Intrinsic value of stock options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Withholding taxes paid on behalf of employees on net settled stock-based awards Taxes withholding obligations paid Payment, Tax Withholding, Share-Based Payment Arrangement Proceeds held as escrow, amount Loss Contingency, Proceeds Held In Escrow Loss Contingency, Proceeds Held In Escrow Net (loss) earnings attributable to People Incorporated common stock and Class B common stock shareholders Net Income (Loss) Available to Common Stockholders, Basic Search Search [Member] Search [Member] (Loss) earnings from discontinued operations before tax Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Share Repurchase Program [Domain] Share Repurchase Program [Domain] Options Additional Disclosures Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Pre-commencement Tender Offer Pre-commencement Tender Offer Mosaic Group Mosaic Group [Member] Mosaic Group [Member] Gain on sale of assets Gain (Loss) on Disposition of Assets Level 1 Fair Value, Inputs, Level 1 [Member] Less than $10.00 Exercise Price Range One [Member] This element represents the range of exercise prices of stock options from $10.01 to $20.00. Related Party Transaction [Table] Related Party Transaction [Table] Diluted (loss) earning per share (in USD per share) (Loss) earnings per share attributable to IAC common stock and Class B common stock shareholders (in USD per share) Earnings Per Share, Diluted Other, Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Loss contingency, prior gain disputed Loss Contingency, Prior Gain Disputed Loss Contingency, Prior Gain Disputed Schedule of Assumptions Defined Benefit Plan, Assumptions [Table Text Block] Treasury stock (in shares) Treasury Stock, Common, Shares Subsidiary Denominated Equity Awards Subsidiary Denominated Equity Awards [Member] Subsidiary Denominated Equity Awards State Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] (Loss) earnings from discontinued operations, net of tax Less: (Loss) earnings from discontinued operations, net of taxes (Loss) earnings from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Marketable debt securities Debt Securities, Available-for-Sale, Current Net actuarial loss (gain) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Federal Tax Authority Domestic Tax Jurisdiction Domestic Tax Jurisdiction [Member] Term Loan B-2 Facility Term Loan B-2 Facility [Member] Term Loan B-2 Facility Other Stockholders' Equity, Other Emerging & Other Emerging & Other [Member] Emerging & Other [Member] Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total Income Taxes Paid, Net Other, Non-taxable or non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Variable Rate Component [Domain] Variable Rate Component [Domain] Variable Rate Component [Domain] Capitalized Sales Commissions Capitalized Sales Commissions [Member] Capitalized Sales Commissions 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Current assets of discontinued operations Total current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Current Long-term debt, gross Long-Term Debt, Gross Tax credit carryforwards subject to expiration Tax Credit Carryforward Amount Subject To Expiration Tax Credit Carryforward Amount Subject To Expiration Granted (in USD per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Accrued employee compensation and benefits Employee-related Liabilities, Current Total Lessee, Operating Lease, Liability, to be Paid Angi Inc. Subsidiaries [Member] Current Capitalized Contract Cost, Net, Current Trade names Trade Names [Member] Investment common shares owned (in shares) Investment Owned, Balance, Shares Intersegment eliminations Intersegment Eliminations [Member] 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five Related party transaction amount Related Party Transaction, Amounts of Transaction SHAREHOLDERS’ EQUITY: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Fixed income Fixed Income Securities [Member] Schedule of Investment in MGM Resorts International Equity Method Investments [Table Text Block] Buildings, land, equipment, leasehold improvements and capitalized software, net Buildings, land, equipment, leasehold improvements and capitalized software, net Property, Plant and Equipment, Net Accounts receivable Increase (Decrease) in Accounts Receivable Content Content [Member] Content Consolidated Entities [Domain] Consolidated Entities [Domain] Income tax provision (benefit) at the federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Care.com Care.com [Member] Care.com [Member] Foreign Currency Translation Adjustment including portion attributable to Noncontrolling Interest Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Adjustment to the liquidation value of Vivian Health preferred shares Adjustments To Additional Paid In Capital, Adjustment To Liquidation Value Adjustments To Additional Paid In Capital, Adjustment To Liquidation Value SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] State and local income taxes, net of effect of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Defined benefit plan, accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Initial level Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Technology Technology-Based Intangible Assets [Member] Options Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable [Abstract] Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant India INDIA Interest Rate Swaps Derivative Liability Net (earnings) loss attributable to noncontrolling interests of continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Total operating costs and expenses Disposal Group, Including Discontinued Operation, Operating Expense Downward adjustment of loss contingency Loss Contingency, Downward Adjustment Of Loss Loss Contingency, Downward Adjustment Of Loss Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Balance at beginning of the period Balance at end of the period Unrecognized Tax Benefits Number of aircraft operated Number of Aircraft Operated Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Denominator: Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Minimum lease payments, leases not yet commenced Unrecorded Unconditional Purchase Obligation 2027 Long-Term Debt, Maturity, Year Two LEASES Lessee, Operating Leases [Text Block] Performance marketing revenue Performance Marketing [Member] Performance Marketing ROU assets Deferred Tax Liabilities, Right-of-Use Assets Deferred Tax Liabilities, Right-of-Use Assets Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Options Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Abstract] Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Abstract] Total Equity Securities without Readily Determinable Fair Value, Annual Amount Equity Securities without Readily Determinable Fair Value, Annual Amount Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Cost of revenue (exclusive of depreciation shown separately below) Cost of revenue Cost of Product and Service Sold Disposal Group Classification [Domain] Disposal Group Classification [Domain] Entity Tax Identification Number Entity Tax Identification Number Contract With Customer Liability [Roll Forward] Contract With Customer Liability [Roll Forward] Contract With Customer Liability Non-current Capitalized Contract Cost, Net, Noncurrent Non-cash lease expense (including right-of-use asset impairments) Operating Lease, Non-cash Lease Expense Operating Lease, Non-cash Lease Expense Number of product users (nearly) Number of Product Users Number of Product Users Balance at beginning of period (in USD per share) Balance at end of period (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Accounts payable, trade Accounts Payable, Trade, Current Unrealized Gains (Losses) On Interest Rate Swaps including portion attributable to Noncontrolling Interest Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] Common stock issued (in shares) Common Stock, Shares, Issued Equity Securities without Readily Determinable Fair Values, Realized and Unrealized Gains (Losses) Equity Securities without Readily Determinable Fair Value, Realized Gains (Losses) [Abstract] Equity Securities without Readily Determinable Fair Value, Realized Gains (Losses) Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] 2029 Long-Term Debt, Maturity, Year Four Remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Proportion of ownership interest held each by entity and by related party in aircraft employing flight crew (as a percent) Percentage of Ownership Interest Held Each by Entity and by Related Party in Aircraft Employing Flight Crew Represents the ownership interest in aircraft and entity employing aircraft flight crew that is held by both the reporting entity and a related party. GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Consolidated net leverage ratio (no greater than) Debt Instrument, Covenant, Consolidated Net Leverage Ratio Debt Instrument, Covenant, Consolidated Net Leverage Ratio Schedule of Goodwill by Reporting Unit Schedule of Goodwill [Table Text Block] Interest expense Interest Expense, Nonoperating Income taxes payable and receivable Increase (Decrease) in Income Taxes Payable Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent Other Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Foreign Income Tax Paid, Foreign, after Refund Received Capital contributions Credit Agreement Capital Contributions Credit Agreement Capital Contributions Cash withholding obligation equivalent (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Cash Withholding Obligation, Shares Share-based Compensation Arrangement by Share-based Payment Award, Cash Withholding Obligation, Shares Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Security cost, percentage responsible Related Party Transaction, Shared Security Cost, Percentage Related Party Transaction, Shared Security Cost, Percentage Net proceeds from the sales of investments and businesses Proceeds from Divestiture of Business and Sale of Long-term Investments Proceeds from Divestiture of Business and Sale of Long-term Investments Prepaid expenses Prepaid Expense, Current Asset Class [Domain] Asset Class [Domain] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Other long-term liabilities Liability, Defined Benefit Plan, Noncurrent Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Statement [Line Items] Statement [Line Items] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Adjusted EBITDA, percentage generated in fourth quarter each year Adjusted EBITDA Generated In Fourth Quarter Each Year, Percent Adjusted EBITDA Generated In Fourth Quarter Each Year, Percent Net (decrease) increase in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Unrealized gain (loss) on investment in MGM Resorts International Unrealized (gain) loss on investment in MGM Resorts International Unrealized Gain (Loss) on Investments SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Restricted cash included in other current assets Restricted Cash, Current Foreign Plan Foreign Plan [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Asset Class [Axis] Asset Class [Axis] Interest rate swaps Interest Rate Swap [Member] Original Issue Discount, Debt Issuance Costs and Deferred Financing Costs Debt, Policy [Policy Text Block] Debt issuance and deferred financing costs Payments of Financing Costs Net (gains) losses on amendments and early terminations of lease agreements Gain (Loss) On Amendment And Termination Of Lease Gain (Loss) On Amendment And Termination Of Lease Leases [Abstract] Leases [Abstract] (Loss) Earnings per share: Basic Earnings Per Share, Basic [Abstract] Additions for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Schedule of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Retirement Plan Name [Axis] Retirement Plan Name [Axis] Withholding taxes paid on the Company’s transfer of Angi Inc. Class B shares to its former CEO Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Basic (loss) earning per share (in USD per share) (Loss) earnings per share attributable to IAC common stock and Class B common stock shareholders (in USD per share) Earnings Per Share, Basic Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Liabilities: Liabilities, Fair Value Disclosure [Abstract] Net cash used in financing activities attributable to continuing operations Cash Provided by (Used in) Financing Activity, Continuing Operation Total deferred tax assets Deferred Tax Assets, Gross Issuance of common stock pursuant to stock-based awards, net of withholding taxes Issuance of Common Stock Pursuant to Stock-Based Awards, Net of Withholding Taxes Issuance of Common Stock Pursuant to Stock-Based Awards, Net of Withholding Taxes Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Tax benefit recognized related to the exercise of stock options Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Discount Rate Measurement Input, Discount Rate [Member] Total other comprehensive income (loss), net of income taxes Other Comprehensive Income (Loss), Net of Tax Earnings (loss) per share from discontinued operations, net of tax, attributable to IAC common stock and Class B common stock shareholders (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Selling and marketing expense Disposal Group, Including Discontinued Operations, Selling and Marketing Expense Disposal Group, Including Discontinued Operations, Selling and Marketing Expense Number of participants Defined Benefit Plan, Number Of Participants Defined Benefit Plan, Number Of Participants Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Affiliated Entity Affiliated Entity [Member] Variable Rate Component [Axis] Variable Rate Component [Axis] Variable Rate Component Net amount recognized, end of year Defined Benefit Plan, Expected Future Benefit Payment Defined Benefit Plan, Expected Future Benefit Payment Long-term investments Total long-term investments Equity Securities Without Readily Determinable Fair Value And Other Long-Term Investments Equity Securities Without Readily Determinable Fair Value And Other Long-Term Investments Remaining assets transferred from retirement assets plan Transfer to QRP Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan Net proceeds from sales of fixed assets Proceeds from Sale of Productive Assets Purchase of MGM Resorts International common shares Payments to acquire equity method investments Payments to Acquire Equity Method Investments Total stock-based compensation expense Stock-based compensation expense Share-based compensation expense Share-Based Payment Arrangement, Expense Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Term Loan A-1 Facility Term Loan A-1 Facility [Member] Term Loan A-1 Facility Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity Foreign Currency Translation and Transaction Gains and Losses Foreign Currency Transactions and Translations Policy [Policy Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] $10.01 to $15.00 Exercise Price Range Two [Member] This element represents the range of exercise prices of stock options from $20.01 to $30.00. Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Non-current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] Cash and cash equivalents and restricted cash at beginning of period Cash and cash equivalents and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Other Deferred Tax Assets, Other 2025 Share Authorization 2025 Share Authorization [Member] 2025 Share Authorization General and administrative expense General and Administrative Expense [Member] Redeemable Noncontrolling Interests Redeemable Noncontrolling Interests [Member] This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Accounting Policies [Abstract] Accounting Policies [Abstract] Operating costs and expenses: Operating Costs and Expenses, Discontinued Operations [Abstract] Operating Costs and Expenses, Discontinued Operations Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Principal payments on Term Loans Repayments of Secured Debt Treasury Stock Treasury Stock, Common [Member] Net earnings (loss) from continuing operations Net earnings (loss) from continuing operations Net earnings (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Fair value of RSUs that vested during the period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Lease liability Total lease liabilities Present value of lease liabilities Operating Lease, Liability Downward adjustments including impairments (gross unrealized pre-tax losses) Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount Tax credit carryforwards related to research and development Tax Credit Carryforward, Related to Research and Development Tax Credit Carryforward, Related to Research and Development Upward (downward) adjustments to the carrying value of equity securities without readily determinable fair values Equity Securities without Readily Determinable Fair Value, Net Upward (Downward) Price Adjustment, Annual Amount Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount LIABILITIES: Liabilities: Liabilities [Abstract] Long-term lease liabilities Deferred Tax Assets, Lease Liabilities, Noncurrent Deferred Tax Assets, Lease Liabilities, Noncurrent Options exercisable (in shares) Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable Soliciting Material Soliciting Material Other long-term liabilities Other Liabilities, Noncurrent Warrant Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Exercise price range, upper limit (in USD per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Goodwill impairment Goodwill impairment Goodwill, Impairment Loss Net (downward) upward adjustments to the carrying value of equity securities without readily determinable fair values and net gains (losses) on sales of investments and businesses (including unrealized losses on investments) Gain (Loss) On Disposition Of Business, Investments And Upward (Downward) Adjustment On Equity Securities Without Readily Determinable Fair Value Gain (Loss) On Disposition Of Business, Investments And Upward (Downward) Adjustment On Equity Securities Without Readily Determinable Fair Value Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Current portion of long-term debt Less: current portion of long-term debt Long-Term Debt, Current Maturities Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Less: unamortized debt issuance costs Debt Issuance Costs, Gross Comprehensive (loss) income attributable to People Incorporated shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Expired (in USD per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Measurement Input Type [Axis] Measurement Input Type [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Schedule of Income before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Percentage of prior gain disputed included in loss contingency accrual Loss Contingency, Percentage Of Prior Gain Disputed Included In Loss Contingency Accrual Loss Contingency, Percentage Of Prior Gain Disputed Included In Loss Contingency Accrual Schedule of Changes in Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Class of Stock Class of Stock [Line Items] Deferred income taxes Deferred Income Tax Liabilities, Net Expected return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract] Total Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] TOTAL ASSETS Assets Schedule of Unvested RSUs Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Geographical [Domain] Geographical [Domain] Income Taxes Income Tax, Policy [Policy Text Block] Components of Deferred Tax Assets and Liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Cash flows from operating activities attributable to continuing operations: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Stock-based compensation expense by function: Non Cash Compensation Expense by Function [Abstract] No definition available. Additional lease impairments Operating Lease, Additional Impairment Loss Operating Lease, Additional Impairment Loss Research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Written Communications Written Communications Indefinite-lived impairment measurement input (as a percent) Indefinite-Lived Intangible Asset, Measurement Input Indefinite-Lived Intangible Asset, Measurement Input Concentration Risk Type [Axis] Concentration Risk Type [Axis] Elimination of Angi Inc. noncontrolling interest Noncontrolling Interest, Decrease from Deconsolidation Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Table] Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Table] Assets: Assets, Fair Value Disclosure [Abstract] Restructuring costs, including certain severance and employee separation benefits Restructuring Costs 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Capitalized Contract Cost [Table] Capitalized Contract Cost [Table] Warrant Warrant [Member] Total Capitalized Contract Cost, Net ROU assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Licensee relationships Licensee Relationships [Member] Licensee Relationships Level 2 Fair Value, Inputs, Level 2 [Member] State and local income taxes, net of effect of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Investment in MGM Resorts International Equity Method Investments Third party fees Debt Instrument, Fee Amount Proportion of ownership interest held each by entity and by related party in another entity employing flight crew (as a percent) Percentage of Ownership Interest Held Each by Entity and by Related Party in Another Entity Employing Flight Crew Represents the percentage of the total purchase price of an aircraft paid by both the Company and a related party. Charges to Other Accounts SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account Change in plan assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Gain (loss) on termination of lease Gain (Loss) on Termination of Lease Increase in the estimated fair value of a warrant Fair Value Adjustment of Warrants Schedule of Components of Income Tax Provision (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Buildings, Land, Equipment, Leasehold Improvements and Capitalized Software Property, Plant and Equipment, Policy [Policy Text Block] Investment in subsidiaries Deferred Tax Liabilities Investment in Subsidiaries The amount as of the balance sheet date of the estimated future tax effects attributable to investments in subsidiaries. Net proceeds from Term Loans refinancing Proceeds from Issuance of Secured Debt People Inc People Inc [Member] People Inc Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] United States UNITED STATES Changes in assets and liabilities, net of effects of acquisitions and dispositions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Current assets Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] Change in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount (Accumulated Deficit) Retained Earnings Retained Earnings [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Total cash and cash equivalents and restricted cash as shown on the statement of cash flows Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Tax positions for which the ultimate deductibility is highly certain but timing is uncertain Unrecognized Tax Benefits Unrelated To Federal Income Taxes Statute Of Limitations Expiring To Be Recognized In Subsequent Periods That Would Income Impact Tax Expense Continuing Operations Unrecognized Tax Benefits Unrelated To Federal Income Taxes Statute Of Limitations Expiring To Be Recognized In Subsequent Periods That Would Impact Income Tax Expense Continuing Operations. 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Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Long-term debt, net Disposal Group, Including Discontinued Operation, Long-Term Debt, Noncurrent Disposal Group, Including Discontinued Operation, Long-Term Debt, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Foreign tax effects Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Advertising revenue Advertising [Member] Royalty Rate Measurement Input, Royalty Rate [Member] Measurement Input, Royalty Rate [Member] Segments [Axis] Segments [Axis] Components of comprehensive (income) loss attributable to noncontrolling interests: Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Local Phone Number Local Phone Number Other, net Payment for (Proceeds from) Other Investing Activity Thereafter Long-Term Debt, Maturity, after Year Five STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] ASSETS Assets: Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Debt Instrument [Axis] Debt Instrument [Axis] People Inc. Credit Agreement amendment costs Debt Restructuring Costs Debt Restructuring Costs Forfeited (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value PENSION AND POST-RETIREMENT BENEFIT PLANS Retirement Benefits [Text Block] FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Loss on the extinguishment of debt Gain (Loss) on Extinguishment of Debt Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Net earnings attributed to unvested participating security Undistributed Discontinued Operation Earnings (Loss), Allocation to Participating Securities, Basic Purchase of treasury stock Value of stock repurchased Treasury Stock, Value, Acquired, Cost Method Interest rate swaps expected to be reclassified into interest expense within next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest rate on debt instrument (as a percent) Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] Long-term lease liabilities Operating Lease, Liability, Noncurrent Foreign Currency Translation Adjustment attributable to Noncontrolling Interest Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] Capitalized software, leasehold improvements and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Professional relationships Professional Relationships [Member] Contractor and Service Professional Relationships and Other [Member] Accounts receivable Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Retirement Plan Name [Domain] Retirement Plan Name [Domain] Maturity period at purchase (less than) Cash Equivalents Maturity Period at Purchase Less Than Short-term investments must have a maturity, at the date of purchase, of less than this specified period in order to be classified as cash equivalents. 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Purchase of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Face amount of debt instrument Debt Instrument, Face Amount Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Income tax provision Discontinued Operation, Tax Effect of Discontinued Operation Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Project and other revenue Project and Other Print [Member] Project and Other Print Net operating loss carryforwards not subject to expiration Operating Loss Carryforwards Not Subject to Expiration The amount of the operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws that can be carried forward indefinitely. Restricted cash included in other non-current assets Restricted Cash, Noncurrent Balance at beginning of the period (in USD per share) Balance at end of the period (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Segment Reporting, Other Significant Reconciling Item Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract] Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract] Deferred income taxes Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Employer contribution limit per calendar year (as a percent of compensation) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Equity securities Stock Issued During Period, Value, Conversion of Convertible Securities Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock, 12,026 and 4,350 shares at December 31, 2025 and 2024, respectively Treasury Stock, Value Shares transferred (in shares) Deferred Compensation Arrangement with Individual, Shares Issued Other current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Defined Benefit Plan and Defined Contribution Plan Disclosures Defined Contribution Plan Disclosure [Line Items] Accumulated Other Comprehensive (Loss) Income including portion attributable to Noncontrolling Interest AOCI Including Portion Attributable to Noncontrolling Interest [Member] Foreign Tax Jurisdiction Foreign Tax Jurisdiction [Member] Segments [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign One Customer One Customer [Member] One Customer Benefit obligation, beginning of year Benefit obligation, end of year Defined Benefit Plan, Benefit Obligation Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Investment in MGM Deferred Tax Liabilities, Investments Net (loss) earnings from discontinued operations attributable to People Incorporated common stock and Class B common stock shareholders Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Diluted Other, Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent Unrealized Gains (Losses) On Available-For-Sale Marketable Debt Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Intangible assets, net of accumulated amortization Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets and Other The cumulative amount of the estimated future tax effects attributable to the difference between the tax basis of intangible assets and other assets and the basis of intangible assets and other assets computed in accordance with generally accepted accounting principles. Newsstand revenue Newsstand [Member] Newsstand Senior Notes Senior Notes [Member] Purchases of investments Payments to Acquire Debt Securities, Available-for-Sale Defined Contribution Plan [Table] Defined Contribution Plan [Table] Employment Transition Agreement Employment Transition Agreement [Member] Employment Transition Agreement Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock, value Common Stock, Value, Issued Cash withholding obligation Share-based Compensation Arrangement by Share-based Payment Award, Cash Withholding Obligation, Amount Share-based Compensation Arrangement by Share-based Payment Award, Cash Withholding Obligation, Amount Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Title and Position [Axis] Title and Position [Axis] Commitments and contingencies Commitments and Contingencies Comprehensive (loss) income, net of income taxes Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Term Loan Loans Payable [Member] Depreciation Disposal Group, Including Discontinued Operation, Depreciation Disposal Group, Including Discontinued Operation, Depreciation Weighted-average exercise price (in USD per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price Noncontrolling Interests Noncontrolling Interest [Member] Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag NumberOfReportableSegmentsNotDisclosedFlag Accounting for Investments in Equity Securities Equity Method Investments [Policy Text Block] Gains and (losses) from lease impairments, terminations and amendments and certain asset sales Gain (Loss) On Impairment, Termination And Amendments Of Lease And Asset Disposal Gain (Loss) On Impairment, Termination And Amendments Of Lease And Asset Disposal Deductions Goodwill, Deductions During Period Goodwill, Deductions During Period Ownership percentage Equity Method Investment, Ownership Percentage Numerator: Basic Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] People Inc. People Inc. [Member] People Inc. Tax credit carryforwards that can be carried forward indefinitely Tax Credit Carryforward Not Subject to Expiration The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws that can be carried forward indefinitely. 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Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Capital distributions Credit Agreement Capital Distributions Credit Agreement Capital Distributions Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Amortization of capitalized contract costs Capitalized Contract Cost, Amortization Amortization of intangibles Disposal Group, Including Discontinued Operation, Amortization Disposal Group, Including Discontinued Operation, Amortization Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Per share information from continuing operations: Earnings Per Share, Basic and Diluted, Continuing Operations [Abstract] Earnings Per Share, Basic and Diluted, Continuing Operations Other income, net Other income, net Nonoperating Income (Expense) Adjusted EBITDA Adjusted EBITDA The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, and (ii) gains and losses recognized on changes in the fair value of contingent consideration arrangements. The Company believes this measure is useful for analysts and investors as this measure allows a more meaningful comparison between our performance and that of our competitors. Moreover, our management uses this measure internally to evaluate the performance of our business as a whole and our individual business segments, and this measure is one of the primary metrics by which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature, and we believe that by excluding these items, Adjusted EBITDA corresponds more closely to the cash operating income generated from our business, from which capital investments are made and debt is serviced. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses. Tax credit carryforwards Tax Credit Carryforward, Amount Adjustment to interest rate Debt Instrument, Adjustment to Interest Rate Debt Instrument, Adjustment to Interest Rate Percentage of principal amount redeemable each twelve months Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemable Each Twelve Months Debt Instrument, Redemption Price, Percentage Of Principal Amount Redeemable Each Twelve Months Deferred revenue Increase (Decrease) in Contract with Customer, Liability Net losses (gains) on sales of investments and businesses (including unrealized losses on investments) Long-term Equity Securities, And Divestiture Of Business, FV-NI, Gain (Loss) Long-term Equity Securities, And Divestiture Of Business, FV-NI, Gain (Loss) Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table] Segment, Reconciliation of Other Items from Segments to Consolidated [Table] Shares forfeited (in shares) Share-Based Compensation Arrangement by 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deficit Retained Earnings (Accumulated Deficit) Impairment charges on indefinite-lived intangible assets Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) Curtailment gain Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment Class of Stock [Axis] Class of Stock [Axis] Employee contribution limit per calendar year (up to) (as a percent of pre-tax earnings) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Unrealized Gains (Losses) On Interest Rate Swaps Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Price Risk Derivatives [Line Items] Price Risk Derivatives [Line Items] Other Deferred Tax Liabilities, Other Current liabilities of discontinued operations Total current liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Current Retirement Plan Type [Axis] Retirement Plan Type [Axis] Other Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Impairment of leasehold improvements Impairment of Leasehold Effect of exchange rate changes on cash and cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Deferred income taxes Deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit) Adjustments to reconcile net earnings (loss) attributable to continuing operations to net cash provided by (used in) operating activities attributable to continuing operations: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Expiration of statutes Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Cash flows from financing activities attributable to continuing operations: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Other non-current assets Assets for Plan Benefits, Defined Benefit Plan, Noncurrent Assets for Plan Benefits, Defined Benefit Plan, Noncurrent Revenue Benchmark Revenue Benchmark [Member] Balance at beginning of period (in shares) Balance at end of period (in shares) Shares, Issued Variable Rate [Domain] Variable Rate [Domain] Balance at January 1 Balance at December 31 Contract with Customer, Liability Proceeds held as escrow, amount allocable to other party Loss Contingency, Proceeds Held In Escrow, Amount Allocable To Other Party Loss Contingency, Proceeds Held In Escrow, Amount Allocable To Other Party Amendment Flag Amendment Flag Tax benefit recognized related to stock-based compensation Share-Based Payment Arrangement, Expense, Tax Benefit Post-Retirement Other Postretirement Benefits Plan [Member] Other non-current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Discount rate (as a percent) Operating Lease, Weighted Average Discount Rate, Percent Schedule of Stock Options Outstanding Share-Based Payment Arrangement, Option, Activity [Table Text Block] Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Number of iconic brands (over) Number of Brands Number of Brands Weighted average basic IAC Common Stock and Class B common stock shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Net operating loss carryforwards without restrictions Operating Loss Carryforwards without Restrictions Operating Loss Carryforwards without Restrictions Related Party Transaction [Domain] Related Party Transaction [Domain] Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Capitalized Contract Cost [Line Items] Capitalized Contract Cost [Line Items] Exercise Price Range [Domain] Exercise Price Range [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Term Loans Term Loans [Member] Term Loans Debt Disclosure [Abstract] Debt Disclosure [Abstract] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Number of vesting installments Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Installments Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Installments Scenario [Domain] Scenario [Domain] Operating costs and expenses: Costs and Expenses [Abstract] Write-offs charged against the allowance Accounts Receivable, Allowance for Credit Loss, Writeoff 2032 Notes 2032 Notes [Member] 2032 Notes Less: original issue discount Debt Instrument, Unamortized Discount Share-based Compensation Arrangement by Share-based Payment Award Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share 2031-2035 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Income tax benefit related to net operating loss carryforwards in continuing operations Income Tax Expense (Benefit) Related to Operating Loss Carryforwards, Continuing Operations Income Tax Expense (Benefit) Related to Operating Loss Carryforwards, Continuing Operations Valuation allowance at end of period Deferred Tax Assets Valuation Allowance Amount Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized amount. Accounting Estimates Use of Estimates, Policy [Policy Text Block] Deferred tax valuation allowance SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Accrued expenses and other current liabilities Liability, Defined Benefit Plan, Current Litigation settlement, amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Options outstanding (in shares) Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Upward adjustments (gross unrealized pre-tax gains) Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Change in foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Forfeited (in USD per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Vivian Health Vivian Health [Member] Vivian Health Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Commitment fee (in basis points) Line of Credit Facility, Commitment Fee Percentage Asset allocation amount Defined Benefit Plan, Plan Assets, Allocation, Amount Defined Benefit Plan, Plan Assets, Allocation, Amount Fixed lease expense Operating Lease, Cost, Net Of Gain (Loss) On Amendment Of Lease Operating Lease, Cost, Net Of Gain (Loss) On Amendment Of Lease Additions for tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Non-deductible executive compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Executive Compensation, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Executive Compensation, Percent Non-deductible goodwill in the sale of Mosaic Effective Income Tax Rate Reconciliation, Nondeductible Expense, Goodwill In Disposition Of Business, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Goodwill In Disposition Of Business, Amount Proceeds from maturities of marketable debt securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Intangible assets, net Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent Subscription period Revenue, Subscription Period Revenue, Subscription Period Consolidation Items [Axis] Consolidation Items [Axis] Variable Rate [Axis] Variable Rate [Axis] Assumed healthcare cost trend rate Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Net earnings (loss) Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Net amount recognized Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Goodwill measurement input (as a percent) Goodwill, Measurement Input Goodwill, Measurement Input