Restricted Cash - Schedule of Restricted Cash (Details) - USD ($) $ in Millions		Sep. 30, 2019	Aug. 31, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash		$ 98	$ 21	$ 72
Escrow deposits on VOI sales
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash		48		45
Reserves related to non-recourse debt
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	[1]	$ 50		$ 27

[1] Includes a $21 million cash deposit that will be released upon future pledging of qualified collateral. See Note 11: Debt & Non-recourse Debt for further discussion.