Consolidated Variable Interest Entities - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Assets, variable interest entity	$ 608	$ 647
Liabilities, variable interest entity	601	640
Variable Interest Entity, Primary Beneficiary | Restricted cash
Variable Interest Entity [Line Items]
Assets, variable interest entity	22	23
Variable Interest Entity, Primary Beneficiary | Timeshare financing receivables, net
Variable Interest Entity [Line Items]
Assets, variable interest entity	580	617
Variable Interest Entity, Primary Beneficiary | Non-recourse debt
Variable Interest Entity [Line Items]
Liabilities, variable interest entity	$ 599	$ 639