Combined Summarized Balance Sheet Information (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Investments In And Advances To Affiliates Schedule Of Investments [Abstract]
Property and equipment, net	$ 1,634	$ 1,708
Timeshare inventory	137	157
Other assets	514	538
Total assets	2,285	2,403
Debt	1,215	1,269
Other liabilities	319	302
Equity	751	832
Total liabilities and equity	$ 2,285	$ 2,403