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

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2018	Mar. 31, 2017
Operating Loss Carryforwards [Line Items]
Effective tax rate	29.10%	40.00%
Federal and state
Operating Loss Carryforwards [Line Items]
Cash income tax payments, net of refunds		$ 11
Foreign
Operating Loss Carryforwards [Line Items]
Cash income tax payments, net of refunds	$ 2	$ 2
Wyndham Worldwide \| Federal and state
Operating Loss Carryforwards [Line Items]
Cash income tax payments, net of refunds	$ 11