Vacation Ownership Notes Receivable - Interest Income Related to VOI Notes Receivable (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Vacation ownership loans – securitized	$ 7	$ 11	$ 25	$ 35
Vacation ownership loans – unsecuritized	13	10	36	27
Interest income related to VOI notes receivable, net	$ 20	$ 21	$ 61	$ 62