Discontinued Operation - Summary of Financial Results of the Vistana Vacation Ownership Business (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Costs and Expenses:
Income (loss) from discontinued operations, net of taxes	$ (228)	$ 18	$ (211)	$ 42
Vistana Vacation Ownership Business [Member]
Revenues:
Owned, leased and consolidated joint venture hotels	9	24	39	49
Vacation ownership and residential sales and services	85	169	269	355
Management fees, franchise fees and other income		1	1	2
Other revenues from managed and franchised properties	21	46	66	90
Total revenues	115	240	375	496
Costs and Expenses:
Owned, leased and consolidated joint venture hotels	7	17	24	37
Vacation ownership and residential sales and services	66	125	206	260
Restructuring and other special charges, net	30	11	37	17
Depreciation	5	9	15	18
Amortization		1		1
Other expenses from managed and franchised properties	21	46	66	90
Total operating expenses	129	209	348	423
Income (loss) from operations of discontinued operations	(14)	31	27	73
Equity earnings and gains (losses) from unconsolidated ventures, net		(1)
Interest expense, net of interest income		(1)	(2)	(4)
Gain (loss) on asset dispositions and impairments, net	(214)		(214)
Income (loss) from discontinued operations before taxes	(228)	29	(189)	69
Income tax expense		(11)	(22)	(27)
Income (loss) from discontinued operations, net of taxes	$ (228)	$ 18	$ (211)	$ 42