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Amount of loss contingency liability.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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Transactions with Former Parent and Former Subsidiaries (Narrative) (Details) £ in Millions, $ in Millions		3 Months Ended
	May 27, 2025 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2026 GBP (£)	Dec. 31, 2025 USD ($)
Sale Of European Vacation Rental Business \| Financial Guarantee \| British Travel Association and Regulatory Authorities
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Secured bonding facility and perpetual guarantee		$ 46
Guarantee, fair value		22
Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesAndOtherLiabilities \| Sale Of European Vacation Rental Business \| European vacation rentals business
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Guarantee, fair value		$ 48
Avis Budget Group (ABG)
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Responsible liability for separation agreement		37.50%
Contingent and other corporate liabilities retained		0.25	0.25
Avis Budget Group (ABG) \| Avis Budget Group (ABG)
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Payments for Legal Settlements	$ 24
Avis Budget Group (ABG) \| Compass, Inc.
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Responsible liability for separation agreement		62.50%
Avis Budget Group (ABG) \| Wyndham Hotels & Resorts, Inc. [Member]
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Contingent and other corporate liabilities retained		0.33	0.33
Wyndham Hotels & Resorts, Inc. [Member]
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Separation and Distribution Agreement, Portion of Certain Contingent and Other Corporate Liabilities Assumed		0.67	0.67
Separation and Distribution Agreement, Portion of Proceeds From Contingent and Other Corporate Assets		0.67	0.67
Wyndham Hotels & Resorts, Inc. [Member] \| Sale Of European Vacation Rental Business \| Financial Guarantee
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Other Receivables, Net, Current		$ 7
Wyndham Hotels & Resorts, Inc. [Member] \| Balance Sheet Location [Axis]: us-gaap:OtherAssets \| Sale Of European Vacation Rental Business
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Other Receivables, Net, Current		$ 7
Wyndham Hotels & Resorts, Inc. [Member] \| Avis Budget Group (ABG)
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Proceeds from Legal Settlements	$ 8
Wyndham Hotels & Resorts, Inc. [Member] \| Wyndham Hotels & Resorts, Inc. [Member]
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Separation and Distribution Agreement, Portion of Certain Contingent and Other Corporate Liabilities Assumed		0.33	0.33
Separation and Distribution Agreement, Portion of Proceeds From Contingent and Other Corporate Assets		0.33	0.33
Affiliated Entity
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Post-closing Credit Support, Portion of Escrow Received Upon Release		0.67	0.67
Post-closing Credit Support, Portion of Guarantees Assumed		0.67	0.67
Affiliated Entity \| Sale Of European Vacation Rental Business \| Financial Guarantee \| British Travel Association and Regulatory Authorities
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Secured bonding facility and perpetual guarantee		$ 81	£ 61
Guarantee, fair value		39	£ 30
Affiliated Entity \| Avis Budget Group (ABG) \| Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesAndOtherLiabilities \| Tax liabilities portion
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Loss Contingency Accrual		$ 1		$ 1
Affiliated Entity \| Wyndham Hotels & Resorts, Inc. [Member]
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Post-closing Credit Support, Portion of Escrow Received Upon Release		0.33	0.33
Vacasa LLC \| Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesAndOtherLiabilities \| Sale Of North American Vacation Rental Business [Member] \| Indemnification Agreement
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Guarantee, fair value		$ 2