Schedule of Intangible Assets Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 59	$ 65	$ 62
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	28	36	33
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	25	24	24
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 6	$ 5	$ 5