Timeshare Financing Receivables - Schedule of Timeshare Financing Receivables (Details) - USD ($) $ in Millions		Mar. 31, 2021		Dec. 31, 2020		Mar. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Timeshare financing receivables		$ 1,147		$ 1,185
Less: allowance for financing receivables losses		(207)		(211)		$ (212)	$ (184)
Timeshare financing receivables, net		940		974
Securitized
Accounts Notes And Loans Receivable [Line Items]
Timeshare financing receivables		730		805
Less: allowance for financing receivables losses		(54)		(63)		(48)	(54)
Timeshare financing receivables, net		676		742
Unsecuritized
Accounts Notes And Loans Receivable [Line Items]
Timeshare financing receivables	[1]	417		380
Less: allowance for financing receivables losses		(153)	[1]	(148)	[1]	$ (164)	$ (130)
Timeshare financing receivables, net	[1]	$ 264		$ 232

[1] Includes amounts used as collateral to secure a non-recourse revolving timeshare receivable credit facility ("Timeshare Facility") as well as amounts held as future collateral for securitization activities.