Summary of Other Income (Expense), Net (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income and Expenses [Abstract]
Interest income	$ 15	$ 25	$ 24
Government grants and incentives	4	3	8
Foreign exchange gain (loss)	11	(5)	(15)
Strategic transaction expenses	(3)	(4)	(10)
Write-off of deferred financing costs	(4)	(4)
Gain on sale of marketable securities		9
Recognition of unrealized gain on payment-in-kind note receivable	2	5
Insurance and other recoveries	2	13	2
Impairment of long-lived assets			(2)
Other	17	13	12
Other income, net	$ 48	$ 55	$ 19