Deferred Revenues - Schedule of Deferred Revenues (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Deferred revenues	$ 262	$ 186
Deferred VOI sales
Disaggregation Of Revenue [Line Items]
Deferred revenues	184	100
Club Activation Fees
Disaggregation Of Revenue [Line Items]
Deferred revenues	65	71
Other
Disaggregation Of Revenue [Line Items]
Deferred revenues	$ 13	$ 15