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Income Taxes - Schedule of Provision for Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current, Federal	$ 827	$ 604	$ (119)
Current, State	86	58	(12)
Current, Foreign	44	43	44
Deferred, Federal	(53)	167	714
Deferred, State	20	(8)	71
Deferred, Foreign	26	24	21
Provision for income taxes	$ 950	$ 888	$ 719

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.