The (Provision for) Benefit from Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal, current	$ (167)	$ (224)	$ (139)
State, current	(40)	(43)	(17)
Non-U.S., current	(50)	(47)	(44)
Current income tax expense (benefit)	(257)	(314)	(200)
Federal, deferred	(131)	(21)	(68)
State, deferred	(7)	(5)	(10)
Non-U.S., deferred	(1)	5	7
Deferred income tax expense (benefit)	(139)	(21)	(71)
Provision benefit for income taxes	$ (396)	$ (335)	$ (271)