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Schedule of Intangible Assets Amortization Expense (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 65 $ 62 $ 65
Licensing Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense 36 33 35
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense 24 24 23
Other Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 5 $ 5 $ 7