Discontinued Operations (Components of Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Loss on disposal of discontinued businesses, net of income taxes	$ 0	$ (1)
Net (loss)/income attributable to Wyndham Destinations shareholders	(134)	80
Discontinued Operations
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Loss on disposal of discontinued businesses, net of income taxes	0	(1)
Net (loss)/income attributable to Wyndham Destinations shareholders	$ 0	$ (1)