Schedule of Intangible Assets Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 59	$ 36	$ 27
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	31	16	12
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	21	18	15
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 7	$ 2	$ 0