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Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal	$ 67	$ 74	$ 94
State and local	7	9	8
Foreign	25	26	27
Deferred
Federal	7	(19)	1
State and local	1	(3)	0
Foreign	(11)	(17)	(3)
Total income tax expense	$ 96	$ 70	$ 127
Effective income tax rate	43.40%	(48.60%)	25.70%

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