Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Investments Investment, Policy [Policy Text Block] 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] Award Timing Predetermined Award Timing Predetermined [Flag] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Excess tax benefits related to equity awards Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Percent Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Additional Paid-in-Capital Additional Paid-in Capital [Member] Interest Rate Swap Interest Rate Swap [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Equity in earnings Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Change attributable to tax positions taken in prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Computation of Basic Earnings Per Share Earnings Per Share, Basic [Abstract] Lease term Lessee, Operating And Finance Lease, Term Of Contract Lessee, Operating And Finance Lease, Term Of Contract Intangible Asset, Acquired, Finite-Lived [Line Items] Intangible Asset, Acquired, Finite-Lived [Line Items] New Accounting Standards Adopted and Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Finance Lease Liability [Abstract] Finance Lease, Liability [Abstract] Schedule of Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Interest expense, net of interest income Interest Income (Expense), Nonoperating Maximum Potential Amount of Future Fundings Guarantor Obligations, Maximum Exposure, Undiscounted Goodwill [Line Items] Goodwill [Line Items] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts Measurement Basis [Axis] Series RR Notes, maturing April 15, 2032 Series RR Notes [Member] Series RR Notes Earnings per share - basic (in USD per share) Basic earnings per share (in USD per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Intra-entity foreign currency long-term-investment gains (losses) Other Comprehensive Income (Loss), Foreign Currency Translation And Translation Gain (Loss), Before Reclassification And Tax, Intra-Entity Foreign Currency Transactions Long-Term-Investment Nature Other Comprehensive Income (Loss), Foreign Currency Translation and Translation Gain (Loss), before Reclassification and Tax, Intra-Entity Foreign Currency Transactions Long-Term-Investment Nature Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Series P Notes, matured October 1, 2025 Series P Senior Notes [Member] Series P Senior Notes [Member] Shares reserved under the stock plan (in shares) Common Stock, Capital Shares Reserved for Future Issuance Series FF Notes, maturing June 15, 2030 Series FF Notes [Member] Series FF Notes Changes in unrecognized tax benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Deferred tax assets Deferred Tax Assets, Gross Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Schedule of Segment Revenue, Segment Expenses, and Segment Profits Schedule of Segment Reporting Information, by Segment [Table Text Block] Current income tax expense Current Income Tax Expense (Benefit) Measurement Input Type [Domain] Measurement Input Type [Domain] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount CitizenM Brand CitizenM Brand [Member] CitizenM Brand Consolidation Consolidation, Policy [Policy Text Block] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense 2028 Finance Lease, Liability, to be Paid, Year Three Reimbursed Expenses Reimbursed Expenses [Member] Reimbursed Expenses Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash and Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Depreciation, amortization, and other Depreciation, Amortization And Other, Excluding Capitalized Contract Cost Amortization Depreciation, Amortization And Other, Excluding Capitalized Contract Cost Amortization Effective rate, Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Stockholders’ deficit Beginning balance Ending balance Equity, Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Stock-based compensation expense (in millions) Share-Based Payment Arrangement, Expense Schedule of Composition of Property and Equipment Balances Property, Plant and Equipment [Table Text Block] Common stock, authorized (in shares) Common Stock, Shares Authorized Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Intangible assets Goodwill and Intangible Assets Disclosure [Abstract] Current assets Assets, Current [Abstract] Liabilities and equity, total Liabilities and Equity Net fee revenues Fee Service [Member] Fee Service [Member] Non-U.S. Operations Foreign Currency Transactions and Translations Policy [Policy Text Block] Senior Notes Senior Notes, Noncurrent Loyalty Program Deferred Tax Assets, Customer Loyalty Program Liability Deferred Tax Assets, Customer Loyalty Program Liability LIABILITIES AND STOCKHOLDERS’ DEFICIT Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum Maximum [Member] Other Deferred Tax Assets, Other Range of amortization life of intangible assets Finite-Lived Intangible Asset, Useful Life Accounting Policies [Abstract] Accounting Policies [Abstract] Surety bonds issued Surety Bonds Amount of surety bonds issued as of the balance sheet date. Definite-lived Intangible Assets, net Finite-Lived Intangible Assets, Net Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] ACQUISITION Asset Acquisition [Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Reconciliation of Restricted Stock Activity [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Treasury Stock, at Cost Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Present value of minimum lease payments Present value of minimum lease payments Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Intangibles and Long-Lived Assets Valuation of Intangibles and Long Lived Assets [Policy Text Block] Valuation of Intangibles and Long Lived Assets Real Estate Sales Real Estate, Policy [Policy Text Block] INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Other noncurrent liabilities Other Liabilities, Noncurrent Series MM Notes, maturing October 15, 2028 Series MM Notes [Member] Series MM Notes Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Dispositions Proceeds from Sale of Property, Plant, and Equipment Amount by which the fair value of equity method investments exceeds company's share of the book value of the investee's net assets Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Goodwill impairment charge Goodwill, Impairment Loss Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Total segment Operating Segments [Member] Schedule of Income Taxes Paid (Net of Refunds Received) Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Schedule of Components of (Losses) Earnings Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] U.S. Income (Loss) from Continuing Operations before Income Taxes, Domestic Current Operating Lease, Liability, Current Deferred tax liabilities Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Goodwill and intangible assets, net, total Intangible Assets, Net (Including Goodwill) Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Furniture and equipment Furniture and Fixtures [Member] Operating profit Guarantee Operating Profit [Member] Guarantee, Operating Profit Award Type Award Type [Axis] Contract with customer liabilities Contract with Customer, Liability, Noncurrent Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Other Long-Term Debt Total assets Assets U.S. & Canada U.S. and Canada Segment [Member] U.S. and Canada Segment Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Expected aggregate future amortization expense of intangible assets for 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Business Combinations Business Combination [Policy Text Block] Distributed (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 Segment, Geographical Geographical [Domain] Geographical [Domain] Changes in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Income Taxes Income Tax, Policy [Policy Text Block] Stock-based compensation plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Address, City or Town Entity Address, City or Town OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Other segment items Segment Reporting, Other Segment Item, Amount Acquired finite-lived intangible assets, weighted average useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life EMEA EMEA Segment [Member] EMEA Segment Deferred tax assets after valuation allowance Deferred Tax Assets, Net of Valuation Allowance Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] RSUs Restricted Stock Units (RSUs) [Member] Tax credits which do not expire Deferred Tax Assets, Tax Credit Carryforwards, Not Subject To Expiration Deferred Tax Assets, Tax Credit Carryforwards, Not Subject To Expiration Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Decrease attributable to settlements with taxing authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Expected aggregate future amortization expense of intangible assets for 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Entity Emerging Growth Company Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three 2026 Finance Lease, Liability, to be Paid, Year One Assets Held for Sale Assets Held for Sale [Policy Text Block] Assets Held for Sale, Policy Dividends declared (in USD per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Capitalized costs Capitalized Contract Cost, Net Finance Leases Finance Lease, Weighted Average Remaining Lease Term Operating lease assets obtained in exchange for lease obligation Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Commercial paper Commercial paper Long-Term Commercial Paper, Noncurrent Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Series KK Notes, maturing April 15, 2029 Series KK Notes [Member] Series KK Notes State and local income tax, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Equity method investments Carrying amount of equity method investments Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Indefinite-lived Intangible Brand Assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Series HH Notes, maturing April 15, 2031 Series HH Notes [Member] Series HH Notes Less: Amount representing interest Finance Lease, Liability, Undiscounted Excess Amount Beginning balance (in shares) Ending balance (in shares) Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Acquired Indefinite-lived Intangible Assets [Line Items] Intangible Asset, Acquired, Indefinite-Lived [Line Items] Schedule of Provision (Benefit) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Interest income Investment Income, Interest Proceeds from debt Proceeds from Issuance of Senior Long-Term Debt Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] United States UNITED STATES Schedule of Additional Information on RSUs Schedule Of Additional Information On Restricted Stock Units [Table Text Block] Schedule Of Additional Information On Restricted Stock Units [Table Text Block] Series II Notes, maturing October 15, 2033 Series II Notes [Member] Series II Notes Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Recorded Liability for Guarantees Guarantor Obligations, Current Carrying Value Changes in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Retained Earnings Retained Earnings [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Effective Interest Rate Debt Instrument, Interest Rate, Effective Percentage Number of RSUs (in millions) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Provision for income taxes Provision for income taxes Effective rate Income Tax Expense (Benefit) Guarantee obligations, term Guarantee Obligation, Term Guarantee Obligation, Term Audit Information [Abstract] Audit Information Intangible assets Intangible assets Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Reimbursements Reimbursements [Member] Reimbursements [Member] Property and equipment, gross Property, Plant and Equipment, Gross Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Self-insurance reserve, employee benefits related Self Insurance Reserve, Employee Benefit Related Self Insurance Reserve, Employee Benefit Related Income Tax Paid, by Individual Jurisdiction [Table] Income Tax Paid, by Individual Jurisdiction [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] U.S. Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Legal Contingencies Commitments and Contingencies, Policy [Policy Text Block] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred Tax Liabilities Deferred Tax Liabilities, Gross [Abstract] Outstanding beginning balance (in shares) Outstanding ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Renewal term Lessee, Operating And Finance Lease, Renewal Term Lessee, Operating And Finance Lease, Renewal Term INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative General and Administrative Expense CALA Caribbean and Latin America Segment [Member] Caribbean and Latin America Segment Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Number of hotels to be added to portfolio(s) Asset Acquisition, Number of Hotels Tb Be Added to Portfolio(s) Asset Acquisition, Number of Hotels Tb Be Added to Portfolio(s) Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Related Party Transactions [Abstract] Related Party Transactions [Abstract] Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Estimated useful lives Property, Plant and Equipment, Useful Life Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation [Line Items] Goodwill Beginning balance Ending balance Goodwill Base management fees Management Service, Base [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Schedule of Composition of Lease Expense and Supplemental Cash Flows Lease, Cost [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Depreciation expense Depreciation Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Loan advances Payments for Loan Advances The cash outflow from advancing money to others in the form of loans. 2029 Finance Lease, Liability, to be Paid, Year Four Interest limitation Deferred Tax Asset, Interest Carryforward -U.S. Federal Deferred Federal Income Tax Expense (Benefit) Equity Components [Axis] Equity Components [Axis] Non-US Non-US [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits [Roll Forward] Auditor Name Auditor Name Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Series X Notes, maturing April 15, 2028 Series X Notes [Member] Series X Notes [Member] Number of reporting segments Number of Reportable Segments Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Advertising Costs Advertising Cost [Policy Text Block] Deferred Tax Assets Deferred Tax Assets, Net of Valuation Allowance [Abstract] Series NN Notes, maturing May 15, 2029 Series NN Notes [Member] Series NN Notes Other Performance Measure, Amount Other Performance Measure, Amount Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Entity Address, State or Province Entity Address, State or Province Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Accrued Expenses and Other Other Current Liabilities [Member] Effective rate, Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Compensation costs from retirement savings plan Defined Contribution Plan, Cost Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Restricted cash Restricted Cash Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] LEASES Lessee, Finance Leases [Text Block] Dividends paid Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Additional paid-in-capital Additional Paid in Capital, Common Stock Income taxes Noncash Income Tax Expense The non-cash component of income tax expense, less the tax benefit from exercise of stock options. Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Allowance for credit losses Accounts and Financing Receivable, Allowance for Credit Loss 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] Cash paid for interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayment of long-term debt Repayments of Long-Term Debt Effective rate Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Series PP Notes, maturing March 15, 2030 Series PP Notes [Member] Series PP Notes Operating lease cost Operating Lease, Cost Change attributable to tax positions taken in prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Weighted Average Grant-Date Fair Value (per unit) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Software Computer Software, Intangible Asset [Member] Series TT ,UU and VV Notes Series TT ,UU and VV Notes [Member] Series TT ,UU and VV Notes Carrying Amount Reported Value Measurement [Member] Valuation allowance Deferred Tax Assets, Valuation Allowance Deferred income Deferred Tax Assets, Deferred Income Equity [Abstract] Equity [Abstract] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Senior Notes Senior Notes Series AA Notes, maturing December 1, 2028 Series AA Notes [Member] Series AA Notes [Member] Total noncurrent financial assets Financial Instruments, Assets, Noncurrent Total of all noncurrent financial instruments that are assets. Derivative Instruments Derivatives, Policy [Policy Text Block] BUSINESS SEGMENTS Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] 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] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current portion of long-term debt Less current portion Long-Term Debt and Lease Obligation, Current Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Net operating loss carry-forwards Deferred Tax Assets, Operating Loss Carryforwards Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Long-term debt, total Debt and Lease Obligation -U.S. Federal Current Federal Tax Expense (Benefit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Series W Notes, maturing October 1, 2034 Series W Notes [Member] Series W Notes [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] 2027 Finance Lease, Liability, to be Paid, Year Two Amortization expense of intangible assets Amortization of Intangible Assets Leases Lessee, Leases [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Contingent consideration (up to) Asset Acquisition, Contingent Consideration, Range Of Outcomes, Maximum Asset Acquisition, Contingent Consideration, Range Of Outcomes, Maximum Deferred tax assets Deferred Income Tax Assets, Net Schedule of Accumulated Other Comprehensive (Loss) Income Activity Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Capital and technology expenditures Payments to Acquire Productive Assets Other noncurrent assets Other Assets, Noncurrent Notes receivable, net Notes receivable Financing Receivable, after Allowance for Credit Loss, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Intellectual property restructuring Effective Income Tax Rate Reconciliation, Intellectual Property Restructuring, Percent Effective Income Tax Rate Reconciliation, Intellectual Property Restructuring, Percent Schedule of Future Principal Payments for Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Revenue Total revenue Cost reimbursement revenue Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Weighted Average Remaining Lease Term (in years) Lease, Weighted Average Remaining Lease Term [Abstract] Lease, Weighted Average Remaining Lease Term [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Accounts Receivable Accounts Receivable [Policy Text Block] Other Non-U.S. jurisdictions Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Finance lease obligations Present value of minimum lease payments Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Change in customer contract liability from change in estimates Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price Liability for guest loyalty program Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Acquired contracts and other Acquired Contracts And Other [Member] Acquired Contracts And Other U.S. statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Other Payment for (Proceeds from) Other Investing Activity Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Thereafter Long-Term Debt, Maturity, after Year Five STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Number of options for renewal (or more than) Lessee, Operating And Finance Lease, Number of Options For Renewal Lessee, Operating And Finance Lease, Number of Options For Renewal ASSETS Assets [Abstract] Debt service Guarantee of Indebtedness of Others [Member] Net operating loss benefits Operating Loss Carryforwards Taxable Income Reduction The sum of domestic, foreign and state and local operating loss carryforwards used to reduce taxable income under enacted tax laws. Underlying Security Market Price Change Underlying Security Market Price Change, Percent Expected aggregate future amortization expense of intangible assets for 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Series TT Notes, maturing July 15, 2027 Series TT Notes [Member] Series TT Notes 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 FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Definite-lived Intangible Assets, gross Finite-Lived Intangible Assets, Gross Stockholders’ deficit Equity, Attributable to Parent [Abstract] 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] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-Lived Intangible Assets by Major Class [Table] Self-insurance reserve, current Self Insurance Reserve, Current Entity Address, Address Line One Entity Address, Address Line One Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Interest Rate Interest rate Debt Instrument, Interest Rate, Stated Percentage Incentive management fees Management Service, Incentive [Member] Operating lease liabilities Noncurrent Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity Voluntary Filers Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Contract acquisition costs and other Contract Acquisition Costs And Other [Member] Contract Acquisition Costs And Other [Member] Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Schedule of Assets And Liabilities, Lessee Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Weighted Average Discount Rate Lease, Weighted Average Discount Rate, Percent [Abstract] Lease, Weighted Average Discount Rate, Percent [Abstract] Net operating losses Operating Loss Carryforwards Other adjustments, net of tax Other Comprehensive Income (Loss), Other Adjustments, after Reclassification and Tax, Parent Other Comprehensive Income (Loss), Other Adjustments, after Reclassification and Tax, 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