Business Segments - Reconciliation of Segment Operating Income to Income from Continuing Operations before Income Taxes (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)		$ 365	$ 273	$ 642	$ 443
Other revenues, less other expenses		9	7	23	6
Depreciation and amortization		(87)	(91)	(176)	(183)
Impairment loss		0	0	0	(15)
General and administrative		(117)	(97)	(222)	(180)
Gain on sales of assets, net		0	1	0	1	$ (1)
Interest expense		(100)	(99)	(204)	(189)
Gain (loss) on foreign currency transactions		5	(14)	1	(26)
Loss on debt extinguishment		0	0	(60)	0
Other non-operating income, net		5	3	6	5
Income (loss) from continuing operations before income taxes		275	163	385	233
Management and franchise [member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	[1]	523	416	959	773
Ownership [member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	[1]	37	37	58	41
Operating segments [member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)		$ 560	$ 453	$ 1,017	$ 814

[1] Includes management, royalty and intellectual property fees charged to our ownership segment by our management and franchise segment, which were eliminated in our condensed consolidated statements of operations.