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Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Issuance of stock-based awards, net of withholding taxes: Shares Granted or Issued, Share-Based Payment Arrangement [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Unrealized losses, less than 12 months, long-term AFS securities Debt Securities, Available-for-sale, Maturity, within One Year, Gross Unrealized Losses, Non-Current Debt Securities, Available-for-sale, Maturity, within One Year, Gross Unrealized Losses, Non-Current 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings per share attributable to common stockholders (in usd per share) Earnings Per Share, Basic Repurchases Payments for Repurchase of Common Stock Unexpired subscriptions revenue Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Content archive Media Content [Member] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable (net of allowances of $11,866 as of June 30, 2026, and $11,406 as of December 31, 2025) Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Restricted cash included within miscellaneous assets Restricted Cash, Noncurrent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Fair value, less than 12 months, short-term AFS securities Debt Securities, Available-for-sale, Maturity, within One Year, Fair Value, Current Debt Securities, Available-for-sale, Maturity, within One Year, Fair Value, Current Number of reporting units Goodwill, Reporting Unit, Number Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Plan Pension Plan Pension Plan [Member] Capital Stock – Class A and Class B Common Common Stock [Member] Performance-based awards (in shares) Stock Issued During Period, Shares, Performance-Based Awards Stock Issued during Period, Shares, Performance-based Awards Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Unrealized gains Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount As % of total Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Foreign currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Depreciation and amortization Cost, Depreciation, Amortization and Depletion Equity Awards Adjustments Equity Awards Adjustments [Member] Product and service benchmark Revenue from Contract with Customer, Product and Service Benchmark [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and stockholders’ equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Total Stockholders’ Equity Parent [Member] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Remainder of 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders’ equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Fair value, 12 months or greater, long-term AFS securities Debt Securities, Available-for-sale, Maturity, Greater than Twelve Months, Fair Value, Non-Current Debt Securities, Available-for-sale, Maturity, Greater than Twelve Months, Fair Value, Non-Current Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Pension and postretirement benefits obligation Defined Benefit Pension And Postretirement Plan Liabilities, Noncurrent, And Multiemployer Plan Withdrawal Obligation This represents (1) the noncurrent liability recognized in the balance sheet that is associated with the defined benefit pension plans (The current liability will be separate, but it will normally be small, if there is even any at all); and (2) the amount of a recognized obligation to a multiemployer plan in the event that the employer withdraws from the plan (In some situations, withdrawal from a multiemployer plan may result in an employer having an obligation to the plan for a portion of the unfunded benefit obligation of the pension plans and other postretirement benefit plans). General and administrative General and Administrative Expense Adjustment to Compensation: Adjustment to Compensation [Axis] Adjusted general and administrative General and Administrative Expense, Adjusted General and Administrative Expense, Adjusted Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Accumulated other comprehensive loss, net of income taxes: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Expense [Line Items] Other Expense [Line Items] [Line Items] for Other Expense [Table] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Loss on foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Real Estate Building Real Estate [Member] Building Real Estate [Member] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term marketable securities Short-Term Investments Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Total short-term AFS securities Short-term Available-for Sale Securities [Member] Short-term Available-for Sale Securities [Member] Multiemployer pension plan withdrawal costs Multiemployer Plan, Employer Contribution, Cost Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Current assets Assets, Current [Abstract] Total adjusted operating profit Operating Income (Loss), Adjusted Operating Income (Loss), Adjusted Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Qualified Plans Qualified Plan [Member] Maturities of marketable securities Proceeds from Sale, Maturity and Collection of Short-Term Investments Income tax expense Income tax expense Income tax expense Income Tax Expense (Benefit) OTHER Other Income and Other Expense Disclosure [Text Block] Award Timing Method Award Timing Method [Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amortization of actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Net income Net income Total reclassification, net of tax Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Unrealized losses, short-term AFS securities Debt Securities, Available-for-sale, Gross Unrealized Losses, Continuous Loss Position, Current Debt Securities, Available-for-sale, Gross Unrealized Losses, Continuous Loss Position, Current Schedule of Changes in Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Restricted stock units vested - Class A shares Stock Issued During Period, Value, Restricted Stock Award, Gross Other Expense [Table] Other Expense [Table] Other Expense [Table] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]