Consolidated Variable Interest Entities - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Assets, variable interest entity		$ 8,097	$ 3,134
Liabilities, variable interest entity		6,203	2,760
Variable Interest Entities
Variable Interest Entity [Line Items]
Assets, variable interest entity		1,113	800
Liabilities, variable interest entity		1,190	771
Variable Interest Entities | Restricted cash
Variable Interest Entity [Line Items]
Assets, variable interest entity		63	28
Variable Interest Entities | Timeshare financing receivables, net
Variable Interest Entity [Line Items]
Assets, variable interest entity		1,033	742
Variable Interest Entities | Non-recourse debt
Variable Interest Entity [Line Items]
Liabilities, variable interest entity	[1]	$ 1,187	$ 766

[1] Net of deferred financing costs.