Other Income Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Foreign exchange rate gains (losses), net	$ 3	$ (46)	$ (15)
Losses on minority equity investments, net	(111)	(14)	(12)
Other	(2)	0	(5)
Total	$ (110)	$ (60)	$ (32)