Timeshare Financing Receivables - Schedule of Change in Allowance For Financing Receivables Losses (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan loss, beginning balance		$ 211		$ 184
Provision for financing receivables losses	[1]	16		37
Write-offs		(20)		(9)
Allowance for loan loss, ending balance		207		212
Securitized
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan loss, beginning balance		63		54
Provision for financing receivables losses	[1]	(9)		(6)
Allowance for loan loss, ending balance		54		48
Unsecuritized
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan loss, beginning balance		148	[2]	130
Provision for financing receivables losses	[1]	25		43
Write-offs		(20)		(9)
Allowance for loan loss, ending balance		$ 153	[2]	$ 164

[1] Includes incremental provision for financing receivables losses, net of activity related to the repurchase of defaulted and upgraded securitized timeshare financing receivables.

[2] 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.