Income Taxes - Components of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
U.S.:
Current	$ (16)
Deferred	6
Other than U.S.:
Current	62	$ 82	$ 62
Deferred	6	22	7
Total provision for income taxes	$ 58	$ 104	$ 69