Comprehensive Income (Loss) and Shareholders' (Deficit) Equity - Accumulated Other Comprehensive Income Activity (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at year-end 2014	$ (70)
Other comprehensive (loss) income before reclassifications	(18)
Reclassification of losses (gains) from accumulated other comprehensive loss	(2)		1
Net other comprehensive (loss) income	(20)
Balance at March 31, 2015	(90)
Other comprehensive income (loss) related to foreign current translation adjustment	44
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	(26)	[1]
Reclassification of losses (gains) from accumulated other comprehensive loss	3
Net other comprehensive (loss) income	(23)
Balance at March 31, 2015	(95)
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	9
Reclassification of losses (gains) from accumulated other comprehensive loss	(5)
Net other comprehensive (loss) income	4
Balance at March 31, 2015	(5)
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	(1)
Reclassification of losses (gains) from accumulated other comprehensive loss	0
Net other comprehensive (loss) income	(1)
Balance at March 31, 2015	$ 10

[1] Other comprehensive (loss) income before reclassifications related to foreign currency translation adjustments includes a gain of $44 million on intra-entity foreign currency transactions that are of a long-term investment nature.