Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other than U.S.:
Current	$ 82	$ 62	$ 44
Deferred	22	7	(2)
Total provision for income taxes	$ 104	$ 69	$ 42