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Income Taxes - Components of Income Tax Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Federal
Current	$ 1,885	$ 1,853	$ 907
Deferred	(83)	45	689
Federal income tax	1,802	1,898	1,596
State
Current	216	334	186
Deferred	14	4	59
State income tax	230	338	245
Applicable income taxes	$ 2,032	$ 2,236	$ 1,841

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