Income Taxes Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ 74	$ 94	$ 78
State and local	9	8	10
Foreign	26	27	26
Deferred
Federal	(19)	1	18
State and local	(3)	0	2
Foreign	(17)	(3)	(3)
Total income tax expense	$ 70	$ 127	$ 131
Effective tax rate	(48.60%)	25.70%	25.80%