Timeshare Financing Receivables - Past Due Financing Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,083	$ 1,095
Financing receivable, past due	1,141	1,145
31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	17	12
91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	5	5
121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	36	33
Securitized
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	566	248
Financing receivable, past due	577	253
Securitized | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	8	3
Securitized | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	1	1
Securitized | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	2	1
Unsecuritized
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	517	847
Financing receivable, past due	564	892
Unsecuritized | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	9	9
Unsecuritized | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	4	4
Unsecuritized | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	$ 34	$ 32