Income Taxes - Comparative Analysis of Components of Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
U.S. federal	$ 64	$ 38	$ 25
State and local	5	3	4
Foreign	83	92	81
Total current income tax expenses	152	133	110
Deferred
U.S. federal	(1)	2	(4)
State and local	1	7	2
Foreign	(3)	(11)	14
Total deferred income tax expenses	(3)	(2)	12
Income tax expense	$ 149	$ 131	$ 122