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Transactions with Former Parent and Former Subsidiaries (Narrative) (Details) £ in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 USD ($)
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Gain on disposal of discontinued business, net of income taxes	$ 32	$ 5	$ 32	$ 5
Legacy items	12	2	13	$ 7
Sale Of European Vacation Rental Business
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Gain on disposal of discontinued business, net of income taxes	32	5
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		46
Guarantee, fair value	22		22
Accrued Expenses and Other Liabilities \| 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		$ 48
Cendant
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		0.25
Separation and Distribution Agreement, Portion of Proceeds From Contingent and Other Corporate Assets	0.67		0.67		0.67
Cendant \| Realogy
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Responsible liability for separation agreement			62.50%
Cendant \| 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		0.33
Separation and Distribution Agreement, Portion of Proceeds From Contingent and Other Corporate Assets	0.33		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		0.67
Post-closing Credit Support, Portion of Escrow Received Upon Release	0.67		0.67		0.67
Post-closing Credit Support, Portion of Guarantees Assumed	0.67		0.67		0.67
Wyndham Hotels & Resorts, Inc. [Member] \| Sale Of European Vacation Rental Business \| General and Administrative Expense [Member]
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Legacy items	$ 12	$ 2
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		$ 7
Wyndham Hotels & Resorts, Inc. [Member] \| Other assets \| Sale Of European Vacation Rental Business
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Other Receivables, Net, Current	$ 7		$ 7
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		0.33
Post-closing Credit Support, Portion of Escrow Received Upon Release	0.33		0.33		0.33
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		$ 81		£ 61
Guarantee, fair value	39		39		£ 31
Affiliated Entity \| Cendant \| Accrued Expenses and Other Liabilities
Separation Adjustments And Transactions With Former Parent And Subsidiaries [Line Items]
Loss Contingency Accrual	24		24			$ 23
Vacasa LLC \| 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		$ 2