Cash dividends (in USD per share) Common Stock, Dividends, Per Share, Cash Paid Award Timing Predetermined Award Timing Predetermined [Flag] 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] Equity in earnings Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Computation of Basic Earnings Per Share Earnings Per Share, Basic [Abstract] New Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] 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 Trading Arrangements, by Individual Trading 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Series P Senior Notes [Member] CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] Series FF Notes, maturing June 15, 2030 Series FF Notes [Member] Series FF Notes 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 Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Depreciation, amortization, and other Depreciation, Amortization And Other, Excluding Capitalized Contract Cost Amortization Depreciation, Amortization And Other, Excluding Capitalized Contract Cost Amortization Stockholders’ deficit Balance at beginning of period Balance at end of period Equity, Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Share-based compensation expense Share-Based Payment Arrangement, Expense 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] Senior Notes Senior Notes, Noncurrent LIABILITIES AND STOCKHOLDERS’ DEFICIT Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] 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] 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] Restructuring and merger-related (recoveries) charges, and other Noncash Restructuring And Merger-Related Costs Noncash Restructuring And Merger-Related Costs 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] 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 Total reportable segment revenue Operating Segments [Member] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name 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] 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 Trading Symbol Trading Symbol 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] Other segment items (primarily non-operating income and expenses) 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 Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount RSUs Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Entity 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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 Retained Earnings Retained Earnings [Member] Effective interest rate Debt Instrument, Interest Rate, Effective Percentage 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 Income Tax Expense (Benefit) 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 Cost reimbursement revenue Reimbursements [Member] Reimbursements [Member] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] 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 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Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Stock-based compensation plans (in shares) Shares Issued, Share-Based Compensation Plan, After Forfeiture Shares Issued, Share-Based Compensation Plan, After Forfeiture 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. Equity Components [Axis] Equity Components [Axis] 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 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 Dividends Dividends, Common Stock Liabilities, current, total Liabilities, Current Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Restricted cash Restricted Cash Dividends paid Payments of Ordinary Dividends, Common Stock 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 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] Interest paid, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Accounting 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 income tax 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 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] Equity [Abstract] Equity [Abstract] 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. 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Acquisition, Contingent Consideration, Range Of Outcomes, Maximum Deferred tax assets Deferred Income Tax Assets, Net Schedule of Accumulated Other Comprehensive Loss Activity Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] 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 Revenue Total 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] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Schedule of Changes in Shareholders' Equity Schedule of Stockholders Equity [Table Text Block] Finance lease obligations Finance Lease, Liability Arrangement Duration Trading Arrangement Duration 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] Other Payment for (Proceeds from) Other Investing Activity Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] ASSETS Assets [Abstract] Debt service Guarantee of Indebtedness of Others [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Series TT Notes, maturing July 15, 2027 Series TT Notes [Member] Series TT Notes FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] 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] 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 Debt Instrument, Interest Rate, Stated Percentage Incentive management fees Management Service, Incentive [Member] Operating lease liabilities Operating Lease, Liability, Noncurrent Increase (decrease) in unrecognized tax benefits Unrecognized Tax Benefits, Period Increase (Decrease) 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 Entity Registrant Name Entity Registrant Name 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] 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, Parent Schedule of Long Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Series VV Notes, maturing October 15, 2035 Series VV Notes [Member] Series VV Notes Stock-based compensation (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Stock awards, granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Costs and expenses Costs and Expenses Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] APEC APEC [Member] APEC Stock awards, weighted average grant-date fair value (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Prepaid expenses and other Prepaid Expense and Other Assets Restatement Determination Date: Restatement Determination Date [Axis] Stock-based compensation plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Other Adjustments Accumulated Gain (Loss), Other Adjustments, Attributable to Parent [Member] Accumulated Gain (Loss), Other Adjustments, Attributable to Parent Derivative liability Derivative Liability, Notional Amount Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Series LL Notes, maturing September 15, 2026 Series LL Notes [Member] Series LL Notes Equity Awards Adjustments Equity Awards Adjustments [Member] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Depreciation and amortization reclassified Depreciation and Amortization Reclassified Depreciation and Amortization Reclassified Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Senior notes, face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Deferred compensation costs related to unvested awards Share-based Compensation, Nonvested Awards, Compensation Cost Not Yet Recognized Share-based Compensation, Nonvested Awards, Compensation Cost Not Yet Recognized Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Deferred revenue recognized Contract with Customer, Liability, Revenue Recognized Fair Value Estimate of Fair Value Measurement [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Franchise fees Franchise [Member] REVENUES Revenues [Abstract] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt Long-term debt, noncurrent Long-Term Debt and Lease Obligation Series QQ Notes, maturing March 15, 2035 Series QQ Notes [Member] Series QQ Notes Number of hotel rooms to be added to portfolio(s) Asset Acquisition, Number of Hotel Rooms To Be Added to Portfolio(s) Asset Acquisition, Number of Hotel Rooms To Be Added to Portfolio(s) Litigation Case [Axis] Litigation Case [Axis] Segments [Domain] Segments [Domain] Series EE Notes, matured May 1, 2025 Series EE Notes [Member] Series EE Notes [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Working capital changes Increase (Decrease) In Working Capital Increase (Decrease) In Working Capital Company Selected Measure Name Company Selected Measure Name Series V Notes, matured March 15, 2025 Series V Notes [Member] Series V Notes [Member] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Senior Notes Senior Notes [Member] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Class A Common Stock Common Stock, Value, Issued Series JJ Notes, maturing October 15, 2027 Series JJ Notes [Member] Series JJ Notes COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Shares for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Series GG Notes, maturing October 15, 2032 Series GG Notes [Member] Series GG Notes Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Liability for guest loyalty program Loyalty program Loyalty Program [Member] Loyalty Program [Member] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] LONG-TERM DEBT Long-Term Debt [Text Block] Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount INCOME TAXES Income Tax Disclosure [Text Block] Computation of Diluted Earnings Per Share Earnings Per Share, Diluted [Abstract] Allowance for credit loss Accounts Receivable, Allowance for Credit Loss Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Not Yet In Effect Condition Not Yet In Effect Condition [Member] Not Yet in Effect Condition Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Document Type Document Type EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Asset Acquisition [Domain] Asset Acquisition [Domain] Issuance of Class A Common Stock Proceeds from Issuance of Common Stock Interest income Investment Income (Loss), Interest Investment Income (Loss), Interest Stock awards, period of service after grant date Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Capital and technology expenditures Payments to Acquire Property, Plant, and Equipment Purchase price Asset Acquisition, Consideration Transferred Name Forgone Recovery, Individual Name Assets, current, total Assets, Current Finite-lived intangible assets acquired Finite-Lived Intangible Assets Acquired Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Number of new lawsuits filed Loss Contingency, New Claims Filed, Number Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Stock-based compensation withholding taxes Payment, Tax Withholding, Share-Based Payment Arrangement Class Action Lawsuits Related to Data Security Incident Class Action Lawsuits Related to Data Security Incident [Member] Class Action Lawsuits Related to Data Security Incident [Member] Derivative, basis spread on variable rate Derivative, Basis Spread on Variable Rate Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Other Guarantee Type, Other [Member] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Segment Profits Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Current liabilities Liabilities, Current [Abstract] Total other comprehensive income (loss), net of tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Indefinite-lived intangible assets acquired Indefinite-Lived Intangible Assets Acquired Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Total noncurrent financial liabilities Financial Instruments, Liabilities, Noncurrent Total of all noncurrent financial instruments that are liabilities. Credit Facility Long-Term Line of Credit Earnings per share - diluted (in USD per share) Diluted earnings per share (in USD per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Contract investment amortization Capitalized Contract Cost, Amortization Liability for guest loyalty program Increase (Decrease) In Contract With Customer, Liability, Cash Increase (Decrease) In Contract With Customer, Liability, Cash EARNINGS PER SHARE Earnings Per Share [Abstract] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Asset acquisition Payments For Asset Acquisitions Payments For Asset Acquisitions Loss Contingencies By Secondary Nature Of Contingency [Domain] Loss Contingencies By Secondary Nature Of Contingency [Domain] Loss Contingencies By Secondary Nature Of Contingency [Domain] Increase (decrease) in deferred revenue Increase (Decrease) in Contract with Customer, Liability Depreciation, amortization, and other (including depreciation and amortization classified in reimbursed expenses) Depreciation, Amortization And Other Depreciation, Amortization And Other Effect of dilutive securities Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired Income taxes paid, net Income Taxes Paid, Net Gross fee revenues Revenues, Gross Of Capitalized Contract Cost, Amortization Revenues, Gross Of Capitalized Contract Cost, Amortization Award Timing Disclosures [Line Items] Accrued payroll and benefits Employee-related Liabilities, Current Operating income Income (Loss) Before Interest Expense And Taxes Income (Loss) Before Interest Expense And Taxes Greater China Greater China [Member] Greater China ACCUMULATED OTHER COMPREHENSIVE LOSS AND STOCKHOLDERS’ DEFICIT Equity [Text Block] Restructuring and merger-related (recoveries) charges, and other Restructuring And Merger-Related Charges (Recoveries), And Other Restructuring And Merger-Related Charges (Recoveries), And Other NET INCOME Net income Net income Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Stock awards, vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Commercial paper/Credit Facility, net Proceeds From (Repayments Of) Commercial Paper And Long Term Lines Of Credit The net cash inflow (outflow) from issuing (borrowing) and repaying commercial paper or line of credit having initial term of repayment greater than one year or the normal operating cycle, if longer. Property and equipment, net Property, Plant and Equipment, Net Series R Notes, maturing June 15, 2026 Series R Notes [Member] Series R Notes [Member] Purchase of treasury stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Loss Contingencies By Secondary Nature Of Contingency [Axis] Loss Contingencies By Secondary Nature Of Contingency [Axis] Loss Contingencies by Secondary Nature of Contingency Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] OPERATING INCOME Operating Income (Loss) Retained earnings Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Issuance of long-term debt Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Contract acquisition costs Increase (Decrease) In Capitalized Contract Costs, Net Increase (Decrease) In Capitalized Contract Costs, Net Series OO Notes, maturing May 15, 2034 Series OO Notes [Member] Series OO Notes Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Schedule of Maximum Potential Amount of Future Fundings as the Primary Obligor for Guarantees and the Liability for Expected Future Fundings Schedule of Guarantor Obligations [Table Text Block] Gains and other income, net Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Adjustments to reconcile to cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Contract with customer liability Contract with Customer, Liability Series SS Notes, maturing April 15, 2037 Series SS Notes [Member] Series SS Notes BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Unrecognized tax benefits Unrecognized Tax Benefits All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Treasury stock, at cost Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Deferred revenue Contract Services, Excluding Loyalty Program [Member] Contract Services, Excluding Loyalty Program [Member] Shares for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Unrecognized tax benefits with tax positions that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Schedule of Reconciliation of the Earnings and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Operating costs Cost of Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number OPERATING COSTS AND EXPENSES Costs and Expenses [Abstract] Asset Acquisition [Axis] Asset Acquisition [Axis] Loan collections Proceeds from Sale and Collection of Notes Receivable Accounts payable Accounts Payable, Trade, Current Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Series RR and SS Notes Series RR and SS Notes [Member] Series RR and SS Notes PSUs Performance-Based Restricted Stock Units (RSUs) [Member] Performance-Based Restricted Stock Units (RSUs) [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Owned, leased, and other revenue Owned, Leased and Other [Member] Owned, Leased and Other [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accounts and notes receivable, net Accounts and Financing Receivable, after Allowance for Credit Loss, Current Insider Trading Arrangements [Line Items] Unallocated corporate and other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Schedule of Segment Revenues Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Maximum aggregate borrowings under credit facility (up to) Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Accrued expenses and other Other Liabilities, Current Brands Trademarks and Trade Names [Member] Asset Class [Domain] Asset Class [Domain] Series UU Notes, maturing October 15, 2031 Series UU Notes [Member] Series UU Notes Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation