Schedule of Intangible Assets Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 65	$ 59	$ 36
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	35	31	16
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	23	21	18
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 7	$ 7	$ 2