Business Combinations Business Combinations Policy [Policy Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Document Type Document Type ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Gains and other income, net Other Nonoperating Income (Expense) COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Related Party [Axis] Related Party [Axis] Treasury Stock, at Cost Treasury Stock [Member] Segments [Axis] Segments [Axis] Accumulated Other Comprehensive (Loss) Income Activity Schedule of Accumulated Other Comprehensive Income (Loss) [Table 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 Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Accounts and notes receivable, net Accounts and Financing Receivable, after Allowance for Credit Loss, Current Leases Lessee, Leases [Policy Text Block] Lease term Lessee, Operating And Finance Lease, Term Of Contract Lessee, Operating And Finance Lease, Term Of Contract Insurance recoveries Insurance Recoveries Proceeds from insurance recoveries Proceeds from Insurance Recoveries Proceeds from Insurance Recoveries Number of properties acquired Asset Acquisition, Number of Properties Acquired Asset Acquisition, Number of Properties Acquired Statistical Measurement [Domain] Statistical Measurement [Domain] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Line of Credit Line of Credit [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Reconciliation of Restricted Stock Activity [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Deferred tax liabilities Deferred Income Tax Liabilities, Net Segment Revenues Reconciliation of Revenue from Segments to Consolidated [Table Text Block] AC Hotels by Marriott AC Hotels by Marriott [Member] AC Hotels by Marriott [Member] Security Exchange Name Security Exchange Name 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 Intangible assets Intangible assets Intangible Assets, Net (Excluding Goodwill) Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%) Series P Senior Notes [Member] Series P Senior Notes [Member] Brands Indefinite-lived Intangible Brand Assets Trademarks and Trade Names [Member] Series FF Notes, interest rate of 4.6%, face amount of $1,000, maturing June 15, 2030 (effective interest rate of 4.8%) Series FF Notes [Member] Series FF Notes Issuance of long-term debt Proceeds from Issuance of Long-term Debt OPERATING INCOME Total segments profits Operating income (loss) Operating Income (Loss) Liabilities, current, total Liabilities, Current Other long-term debt Other Long-term Debt, Noncurrent Accounts Receivable Accounts Receivable [Policy Text Block] Host Hotels & Resorts Inc Host Hotels & Resorts Inc [Member] Host Hotels & Resorts Inc Outstanding beginning balance (in USD per share) Outstanding ending balance (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 Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 (effective interest rate of 3.1%) Series U Notes [Member] Series U Notes [Member] Total minimum lease payments Finance Lease, Liability, Payment, Due Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Purchase of treasury stock Payments for Repurchase of Common Stock ASSETS Assets [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Accounting Policies [Abstract] Accounting Policies [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Furniture and equipment Furniture and Fixtures [Member] Stock-based compensation plans Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Entity Address, State or Province Entity Address, State or Province Distributed (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Operating cash outflows for operating leases Operating Lease, Payments Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) 2023 Long-Term Debt, Maturity, Year Three Allowance for credit losses Accounts and Financing Receivable, Allowance for Credit Loss Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Repayments under credit agreement Repayments of Lines of Credit Operating lease assets Operating Lease, Right-of-Use Asset Base management fees Management Service, Base [Member] Derivative instrument adjustments and other, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Accounting Standards Update 2016-01 Accounting Standards Update 2016-01 [Member] Finite lived intangible assets acquired Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Net fee revenues Fee Service [Member] Fee Service [Member] 2021 Lessee, Operating Lease, Liability, to be Paid, Year One Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired 2021 Finance Lease, Liability, to be Paid, Year One 2024 Lessee, Operating Lease, Liability, to be Paid, Year Four Loyalty Program Deferred Tax Assets, Customer Loyalty Program Liability Deferred Tax Assets, Customer Loyalty Program Liability Long-term debt Long-term debt, noncurrent Long-term Debt and Lease Obligation AOCI Attributable to Parent [Roll forward] [Abstract] AOCI Attributable to Parent, Net of Tax [Roll Forward] Major Customers Customer [Axis] -U.S. State Current State and Local Tax Expense (Benefit) Maximum Potential Amount of Future Fundings Guarantor Obligations, Maximum Exposure, Undiscounted Surety bonds issued Surety Bonds Amount of surety bonds issued as of the balance sheet date. Income Taxes Income Tax, Policy [Policy Text Block] EMEA Europe, Middle East and Africa Segment [Member] Europe, Middle East and Africa Segment Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Other noncurrent liabilities Other noncurrent liabilities Other Liabilities, Noncurrent Deferred tax assets Deferred Income Tax Assets, Net Other Payments for (Proceeds from) Other Investing Activities Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Financing cash outflows for finance leases Finance Lease, Principal Payments Intangibles and Long-Lived Assets Valuation of Intangibles and Long Lived Assets [Policy Text Block] Valuation of Intangibles and Long Lived Assets Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Thereafter Long-Term Debt, Maturity, after Year Five Advertising costs Advertising Expense Investments Investment, Policy [Policy Text Block] Series DD Notes, interest rate of 2.1%, face amount of $224, maturing October 3, 2022 (effective interest rate of 1.2%) Series DD Notes [Member] Series DD Notes [Member] Geographical [Domain] Segment, Geographical Geographical [Domain] Contract investment amortization Capitalized Contract Cost, Amortization Statement [Line Items] Statement [Line Items] Tax on asset dispositions Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent Forecast Forecast [Member] -Non-U.S. Deferred Foreign Income Tax Expense (Benefit) Class of Stock [Domain] Class of Stock [Domain] Commercial paper, maturity term Debt Instrument, Term Entity Voluntary Filers Entity Voluntary Filers Measurement Input Type [Domain] Measurement Input Type [Domain] Asia Pacific Asia Pacific Segment [Member] Asia Pacific Segment [Member] Statement [Table] Statement [Table] Type of Restructuring [Domain] Type of Restructuring [Domain] Statistical Measurement [Axis] Statistical Measurement [Axis] Credit Facility [Axis] Credit Facility [Axis] Operating profit Guarantee Operating Profit [Member] Guarantee, Operating Profit Change in U.S. tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Property purchased Payments for Asset Acquisitions Payments for Asset Acquisitions Restructuring and merger-related charges Noncash Merger Related and Restructuring Costs Noncash Merger Related and Restructuring Costs Series Z Notes, interest rate of 4.2%, face amount of $350, maturing December 1, 2023 (effective interest rate of 4.4%) Series Z Notes [Member] Series Z Notes [Member] U.S. & Canada U.S. and Canada Segment [Member] U.S. and Canada Segment Business Combinations [Abstract] Business Combinations [Abstract] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Entity Small Business Entity Small Business Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Issuance of Class A Common Stock Proceeds from Issuance of Common Stock Cost of revenues Reimbursed expenses Cost of Revenue U.S. and Canada Properties U.S. & Canada Properties [Member] U.S. & Canada Properties [Member] Goodwill [Roll Forward] Goodwill [Roll Forward] Excess tax benefits related to equity awards Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Percent Amendment Flag Amendment Flag Reconciliation of the Earnings (Losses) 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] Tax credits which expire Deferred Tax Assets, Tax Credit Carryforwards, Not Subject To Expiration Deferred Tax Assets, Tax Credit Carryforwards, Not Subject To Expiration Caribbean and Latin America Properties Caribbean and Latin America Properties [Member] Caribbean and Latin America Properties Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] LEASES Lessee, Finance Leases [Text Block] Assets Held for Sale Assets Held for Sale [Policy Text Block] Assets Held for Sale, Policy Unallocated corporate and other Corporate, Non-Segment [Member] Credit Facility Outstanding borrowings Long-term Line of Credit Reclassification adjustments Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Sheraton Grand Chicago Hotel Sheraton Grand Chicago Hotel [Member] Sheraton Grand Chicago Hotel [Member] Self-insurance reserve, noncurrent Self Insurance Reserve, Noncurrent Guarantees Minimum Guarantees, Policy [Policy Text Block] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Entity Central Index Key Entity Central Index Key Related Party [Domain] Related Party [Domain] RESTRUCTURING CHARGES Restructuring and Related Activities Disclosure [Text Block] Liability for guest loyalty program Increase (Decrease) in Contract with Customer, Liability, Cash Increase (Decrease) in Contract with Customer, Liability, Cash Related Party Transaction [Line Items] Related Party Transaction [Line Items] Derivative Instrument and Other Adjustments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] RELATIONSHIP WITH MAJOR CUSTOMER Relationship With Major Customer [Text Block] This element may be used to capture the complete disclosure about the extent of the entity's reliance on its major customers. If revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, the entity must disclose that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. Summarized Information for the Entities Equity Method Investments, Balance Sheet Equity Method Investees, Balance Sheet Data [Table Text Block] Equity Method Investees, Balance Sheet Data Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Other noncurrent liabilities Other Noncurrent Liabilities [Member] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Composition of Intangible Assets, Finite-Lived Schedule of Finite-Lived Intangible Assets [Table Text Block] Asset Acquisition [Domain] Asset Acquisition [Domain] [Domain] for Asset Acquisition [Axis] Senior Notes Senior Notes [Member] Derivative Instruments Derivatives, Policy [Policy Text Block] Geographical [Axis] Geographical [Axis] 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] Segments [Domain] Segments [Domain] Deferred Tax Assets Deferred Tax Assets, Net of Valuation Allowance [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Legal Contingencies Commitments and Contingencies, Policy [Policy Text Block] Summarized Information for the Entities Equity Method Investments, Income Statement Equity Method Investees, Income Statement Data [Table Text Block] Equity Method Investees, Income Statement Data 2024 Long-Term Debt, Maturity, Year Four Net proceeds Proceeds from Debt, Net of Issuance Costs Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment by Type Long-Lived Tangible Asset [Axis] Guarantee obligations, term Guarantee Obligation, Term Guarantee Obligation, Term Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%) Series N Senior Notes [Member] Series N Senior Notes [Member] Income Statement Location [Axis] Income Statement Location [Axis] Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income Statement Location [Domain] Income Statement Location [Domain] Contract acquisition costs Increase (Decrease) in Capitalized Contract Costs, Net Increase (Decrease) in Capitalized Contract Costs, Net 2022 Lessee, Operating Lease, Liability, to be Paid, Year Two Reimbursements Reimbursements [Member] Reimbursements [Member] FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] -U.S. Federal Current Federal Tax Expense (Benefit) Amortization expense of intangible assets Amortization of Intangible Assets Deferred income Deferred Tax Assets, Deferred Income Composition of Lease Expense and Supplemental Cash Flows Lease, Cost [Table Text Block] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Three Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Other noncurrent assets Other Assets, Noncurrent BUSINESS SEGMENTS Segment Reporting Disclosure [Text Block] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Elegant Hotels Group plc Elegant Hotels Group plc [Member] Elegant Hotels Group plc [Member] Operating cash outflows for finance leases Finance Lease, Interest Payment on Liability Total assets Assets (primarily composed of hotel real estate managed by us) Assets RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Scenario [Axis] Scenario [Axis] Number of properties disposed Disposal Group, Including Discontinued Operation, Number of Properties Disposed Disposal Group, Including Discontinued Operation, Number of Properties Disposed Impairment loss from building accounted for as a finance lease Finance Lease, Impairment Loss 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 Title of 12(b) Security Title of 12(b) Security Disposal Group Classification [Axis] Disposal Group Classification [Axis] Schedule of Asset Acquisition [Line Items] Schedule of Asset Acquisition [Line Items] [Line Items] for Schedule of Asset Acquisition [Table] Definite-lived Intangible Assets, net Finite-Lived Intangible Assets, Net Finance Leases Finance Lease, Liability, Payment, Due [Abstract] Renewal term Lessee, Operating And Finance Lease, Renewal Term Lessee, Operating And Finance Lease, Renewal Term CALA Caribbean and Latin America Segment [Member] Caribbean and Latin America Segment Gain (loss) on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Subsequent Event Type [Axis] Subsequent Event Type [Axis] Reimbursed expenses Cost of Sales [Member] Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Maturities of Finance Lease Liabilities Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Interest expense Interest Expense Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] DISPOSITIONS AND ACQUISITIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Benefit (Provision) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Loan advances Payments for Loan Advances The cash outflow from advancing money to others in the form of loans. Product and Service [Axis] Product and Service [Axis] Liabilities Liabilities Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] 2025 Finance Lease, Liability, to be Paid, Year Five Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Series X Notes, interest rate of 4.0%, face amount of $450, maturing April 15, 2028 (effective interest rate of 4.2%) Series X Notes [Member] Series X Notes [Member] Less: Amount representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount International Non-US [Member] 2022 Long-Term Debt, Maturity, Year Two Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] 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 Revenue recognized from customer contract liability Contract with Customer, Liability, Revenue Recognized Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Interest and penalties related to unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] 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] Contracts acquired in business combinations and other Contract-Based Intangible Assets [Member] Debt Instrument [Axis] Debt Instrument [Axis] Additional Paid-in- Capital Additional Paid-in Capital [Member] Schedule of Quarterly Financial Information Quarterly Financial Information [Table Text Block] Total segment Operating Segments [Member] Deferred revenue changes and other Other Operating Activities, Cash Flow Statement Purchase obligation, expected to fund commitments in 2022 Purchase Obligation, to be Paid, Year Two Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Income taxes Noncash Income Tax Expense The non-cash component of income tax expense, less the tax benefit from exercise of stock options. Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Asset Class [Axis] Asset Class [Axis] Adjustments to reconcile to cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Litigation Case [Axis] Litigation Case [Axis] Series CC Notes, interest rate of 3.6%, face amount of $550, maturing April 15, 2024 (effective interest rate of 3.9%) Series CC Notes [Member] Series CC Notes [Member] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Beginning balance (in shares) Ending balance (in shares) Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Equity method investments Carrying amount of equity method investments Equity Method Investments Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Variable lease cost Variable Lease, Cost Avendra LLC Avendra LLC [Member] Avendra LLC [Member] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Revolving Credit Facility Revolving Credit Facility [Member] Receivables, net Deferred Tax Assets, Receivables, Net Deferred Tax Assets, Receivables, Net (LOSS) INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Number of properties owned or leased Number of Customer Owned or Leased Lodging Properties Managed Number of Customer Owned or Leased Lodging Properties Managed Subsequent Event Subsequent Event [Member] Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Letters of credit outstanding Letters of Credit Outstanding, Amount Common stock, authorized (in shares) Common Stock, Shares Authorized Changes in Outstanding RSU Grants Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Property and equipment, gross Property, Plant and Equipment, Gross Series AA Notes, interest rate of 4.7%, face amount of $300, maturing December 1, 2028 (effective interest rate of 4.8%) Series AA Notes [Member] Series AA Notes [Member] Stock-based compensation (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total noncurrent financial assets Financial Instruments, Assets, Noncurrent Total of all noncurrent financial instruments that are assets. -U.S. Federal Deferred Federal Income Tax Expense (Benefit) Restructuring Plan [Domain] Restructuring Plan [Domain] Current portion of long-term debt Less current portion Long-term Debt and Lease Obligation, Current Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Term of lease not commenced Lessee, Operating and Finance Lease, Lease Not Commenced, Term of Contract Lessee, Operating and Finance Lease, Lease Not Commenced, Term of Contract Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%) Series W Notes [Member] Series W Notes [Member] Fair Value Estimate of Fair Value Measurement [Member] Income Statement [Abstract] Income Statement [Abstract] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Period of service after grant date Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Loss (gain) on asset dispositions Gain (Loss) on Disposition of Assets Operating lease liabilities Noncurrent Operating Lease, Liability, Noncurrent Expected aggregate future amortization expense of intangible assets for 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Four Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Name of Property [Domain] Name of Property [Domain] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] 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] Current assets Assets, Current [Abstract] Interest income Investment Income, Interest Weighted Average Remaining Lease Term (in years) Lease, Weighted Average Remaining Lease Term [Abstract] Lease, Weighted Average Remaining Lease Term [Abstract] Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2023 Finance Lease, Liability, to be Paid, Year Three Other Guarantee Type, Other [Member] Capitalized costs Capitalized Contract Cost, Net Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] 2021 Long-Term Debt, Maturity, Year One Reconciliation of the U.S. Statutory Tax Rate to Effective Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Change in customer contract liability from prepayment Contract with Customer Liability, Increase (Decrease) for Prepayment Contract with Customer Liability, Increase (Decrease) for Prepayment Gross fee revenues Revenues, Gross of Capitalized Contract Cost, Amortization Revenues, Gross of Capitalized Contract Cost, Amortization Scenario [Domain] Scenario [Domain] Other comprehensive (loss) income before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Capital and technology expenditures Capital expenditures Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code Consolidation Items [Domain] Consolidation Items [Domain] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Document Period End Date Document Period End Date LONG-TERM DEBT Long-term Debt [Text Block] Lease Terms and Discount Rate Schedule of Lessee, Leases, Terms [Table Text Block] Schedule of Lessee, Leases, Terms [Table Text Block] INTANGIBLE ASSETS AND GOODWILL Goodwill and Intangible Assets Disclosure [Text Block] 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. Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Accrual for loss contingency Loss Contingency Accrual Shares reserved under the stock plan (in shares) Common Stock, Capital Shares Reserved for Future Issuance Lease assets obtained in exchange for lease obligations: Right-of-Use Asset Obtained in Exchange for Lease Liability [Abstract] Right-of-Use Asset Obtained in Exchange for Lease Liability [Abstract] Equity in (losses) earnings Income (Loss) from Equity Method Investments Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] JWM Family Enterprise, L.P. JWM Family Enterprise, L.P. [Member] JWM Family Enterprise, L.P. [Member] Employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Stock-based compensation Share-based Payment Arrangement, Noncash Expense Maximum leverage ratio Debt Instrument, Covenant, Leverage Ratio Debt Instrument, Covenant, Leverage Ratio Loan collections Proceeds from Sale and Collection of Notes Receivable Restructuring and merger-related charges Restructuring Charges and Business Combination, Acquisition And Integration Related Costs [Member] Restructuring Charges and Business Combination, Acquisition And Integration Related Costs Other Proceeds from (Payments for) Other Financing Activities Stock-based compensation withholding taxes Payment, Tax Withholding, Share-based Payment Arrangement Contract acquisition costs and other Contract Acquisition Costs And Other [Member] Contract Acquisition Costs And Other [Member] Asia Pacific Properties Asia Pacific Properties [Member] Asia Pacific Properties Cover [Abstract] Cover [Abstract] Restructuring Reserve Activity Restructuring and Related Costs [Table Text Block] Measurement Input Type [Axis] Measurement Input Type [Axis] Assets And Liabilities, Lessee Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee SUPPLEMENTARY DATA QUARTERLY FINANCIAL DATA - UNAUDITED Quarterly Financial Information [Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Weighted Average Discount Rate Lease, Weighted Average Discount Rate, Percent [Abstract] Lease, Weighted Average Discount Rate, Percent [Abstract] Reimbursed Expenses Reimbursed Costs [Member] Reimbursed Costs [Member] Equity Method Investment Equity Method Investee [Member] Estimated useful lives Property, Plant and Equipment, Useful Life Components of (Losses) Earnings Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Goodwill [Line Items] Goodwill [Line Items] Other Long-term Debt Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Change in customer contract liability Increase (Decrease) in Contract with Customer, Liability LEASES Lessee, Operating Leases [Text Block] Data Security Incident Data Security Incident [Member] Data Security Incident [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Long-term debt Debt and Lease Obligation Lease liabilities Deferred Tax Assets, Leasing Arrangements Deferred Tax Assets, Leasing Arrangements Number of renewals (or more than) Lessee, Operating And Finance Lease, Number of Renewals Lessee, Operating And Finance Lease, Number of Renewals Net deferred taxes Deferred Tax Assets, Net Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Costs and Expenses, Total Costs and Expenses Equity Components [Axis] Equity Components [Axis] Number of lawsuits filed Loss Contingency, Pending Claims, Number Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Deferred tax assets Deferred Tax Assets, Gross Minimum Minimum [Member] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Capital Expenditures Reconciliation Of Capitalized Expenditures from Segment to Consolidated [Table Text Block] Reconciliation of Capitalized Expenditures from Segment to Consolidated Impairment charges Equity Method Investment, Other than Temporary Impairment Land Land [Member] Current Operating Lease, Liability, Current Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Forfeited (in USD per share) Share-based Compensation Arrangement by 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