Consolidated Variable Interest Entities - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Assets, variable interest entity		$ 799	$ 647
Liabilities, variable interest entity		798	640
Variable Interest Entity, Primary Beneficiary | Restricted cash
Variable Interest Entity [Line Items]
Assets, variable interest entity		49	23
Variable Interest Entity, Primary Beneficiary | Timeshare financing receivables, net
Variable Interest Entity [Line Items]
Assets, variable interest entity		735	617
Variable Interest Entity, Primary Beneficiary | Non-recourse debt
Variable Interest Entity [Line Items]
Liabilities, variable interest entity	[1]	$ 795	$ 639

[1] Net of deferred financing costs