Fair Value Measurements - Schedule of Carrying and Estimated Fair Value Amounts (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Carrying Amount
Assets:
Timeshare financing receivables, net	$ 1,074	$ 1,071
Liabilities:
Debt, net	479	482
Non-recourse debt, net	544	583
Level 1
Assets:
Timeshare financing receivables, net	0	0
Liabilities:
Debt, net	322	329
Non-recourse debt, net	0	0
Level 3
Assets:
Timeshare financing receivables, net	1,299	1,292
Liabilities:
Debt, net	191	194
Non-recourse debt, net	$ 537	$ 577