Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 14, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value (in dollars per share)	$ 19.58	$ 8.59	$ 10.46
Stock-based compensation expense	$ 28	$ 21	$ 20
Separation related costs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			4
Restructuring Charges
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 2	$ 1
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0.7
Grant date fair value (in dollars per share)	$ 60.37	$ 54.15
Vested (in shares)	0.3
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0.1
Grant date fair value (in dollars per share)	$ 57.51	$ 52.93
Wyndham Hotels & Resorts, Inc. 2018 Equity and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares approved (in shares)				10.0
Remaining shares available (in shares)	5.4