Commitments and Contingencies (Details) $ in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($) defendant	Jun. 30, 2024 USD ($) classAction	Mar. 31, 2023
Schedule Of Commitments And Contingencies [Line Items]
Number of class actions | classAction		2
Number of class actions seeking damages | classAction		1
Range of possible loss (up to)		$ 40
Purchase obligation over the next twelve months		$ 1,400
Long-term purchase commitment, term		12 months
Purchase commitment period decrease		$ 5,400
Other receivables	$ 140	138
Cause No. CC-23-03188-E | Pending Litigation
Schedule Of Commitments And Contingencies [Line Items]
Number of defendants | defendant	2
Estimate possible loss (in excess of)	$ 1
Realogy
Schedule Of Commitments And Contingencies [Line Items]
Other receivables		39
Wyndham
Schedule Of Commitments And Contingencies [Line Items]
Other receivables		$ 24
Tax Liability | Real Estate Inc
Schedule Of Commitments And Contingencies [Line Items]
Liability assumed, percent			62.50%
Tax Liability | Wyndham Hotels And Resorts Inc And Travel + Leisure Co.
Schedule Of Commitments And Contingencies [Line Items]
Liability assumed, percent			37.50%