Wyndham Hotels & Resorts, Inc. Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jan. 01, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, allowance for credit loss		$ 79	$ 74	$ 79	$ 74	$ 72	$ 47
Income tax benefit		$ 36	$ 15	$ 72	$ (25)
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, allowance for credit loss	$ 10					$ 12
Income tax benefit	$ 2

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.