Provision for (Benefit from) Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal	$ (109)
State	(16)	(3)	2
Foreign	7	36	36
Current income tax provision	(118)	33	38
Deferred
Federal	93	36	(7)
State	20	10	8
Foreign	15	(14)	(21)
Deferred income tax benefit	128	32	(20)
Provision for income taxes	$ 10	$ 65	$ 18