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

Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Losses recognized in income from freestanding foreign currency exchange contracts			$ 3	$ 2
Foreign currency impact of highly inflationary countries	$ 4	$ 0	4	$ 0
Management guarantee receivable	40		40
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt	2,145		2,145
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt	$ 2,176		$ 2,176