Other Comprehensive (Loss) Income and Shareholders' (Deficit) Equity - Accumulated Other Comprehensive Income Activity (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014				$ (70)
Reclassification of losses (gains) from accumulated other comprehensive loss		$ (2)	$ 1	(4)	$ 2
Balance at June 30, 2015		(88)		(88)
Other comprehensive income (loss) before reclassification related to foreign current translation adjustment, gain on intra-equity foreign currency transaction				36
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014				(72)
Other comprehensive (loss) income before reclassifications	[1]			(19)
Reclassification of losses (gains) from accumulated other comprehensive loss				3
Net other comprehensive (loss) income				(16)
Balance at June 30, 2015		(88)		(88)
Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014				(9)
Other comprehensive (loss) income before reclassifications				7
Reclassification of losses (gains) from accumulated other comprehensive loss				(7)
Net other comprehensive (loss) income				0
Balance at June 30, 2015		(9)		(9)
Unrealized Gains on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014				11
Other comprehensive (loss) income before reclassifications				(2)
Reclassification of losses (gains) from accumulated other comprehensive loss				0
Net other comprehensive (loss) income				(2)
Balance at June 30, 2015		9		9
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014				(70)
Other comprehensive (loss) income before reclassifications				(14)
Reclassification of losses (gains) from accumulated other comprehensive loss				(4)
Net other comprehensive (loss) income				(18)
Balance at June 30, 2015		$ (88)		$ (88)

[1] Other comprehensive (loss) income before reclassifications for foreign currency translation adjustments includes a gain of $36 million on intra-entity foreign currency transactions that are of a long-term investment nature.