Timeshare Financing Receivables - Past Due Financing Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,137	$ 1,245
Financing receivable, past due and current	1,263	1,340
31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	25	21
91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	9	7
121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	92	67
Securitized
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	935	743
Financing receivable, past due and current	956	758
Securitized | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	12	9
Securitized | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	4	3
Securitized | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	5	3
Unsecuritized
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	202	502
Financing receivable, past due and current	307	582
Unsecuritized | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	13	12
Unsecuritized | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	5	4
Unsecuritized | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	$ 87	$ 64