Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Non Variable Interest Entities [Line Items]
Federal statutory rate	35.00%	35.00%	35.00%
Deferred income taxes, net	$ 939	$ 1,009
Non U.S. deferred tax liability	12
Valuation allowance	0	0
NOL carryforward	2,800
Foreign tax credit	9
Alternative minimum tax credit carryforward	$ 22	$ 22