Income Taxes - Comparative Analysis of Components of Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
U.S. federal	$ 8	$ (23)	$ (9)
State and local	1	1	4
Foreign	119	101	85
Total current income tax expenses	128	79	80
Deferred
U.S. federal	(35)	16	(95)
State and local	(5)	(3)	(1)
Foreign	(25)	(21)	12
Total deferred income tax expenses	(65)	(8)	(84)
Income tax expense	$ 63	$ 71	$ (4)