Reclassification out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains and other income, net	[1]									$ 27	$ 8	$ 11
Interest expense	[1]									(167)	(115)	(120)
Income before income taxes										1,255	1,088	897
Provision for income taxes										(396)	(335)	(271)
NET INCOME		$ 202	$ 210	$ 240	$ 207	$ 197	$ 192	$ 192	$ 172	859	$ 753	$ 626
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Translation Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains and other income, net										(3)
Income before income taxes										(3)
Provision for income taxes										0
NET INCOME										(3)
Reclassification out of Accumulated Other Comprehensive Income | Derivative Instrument Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Base management and franchise fees										10
Gains and other income, net										3
Interest expense										(5)
Income before income taxes										8
Provision for income taxes										2
NET INCOME										$ 10

[1] See Footnote No. 17, “Related Party Transactions,” to our Consolidated Financial Statements for disclosure of related party amounts.