Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Reconciliation (Table Amounts) [Abstract]
Income tax expense on continuing operations at statutory rate	$ 1,038	$ 1,079	$ 828
Manufacturing deduction	(42)	(32)	(33)
Research tax credit	0	(17)	(12)
Tax settlements and adjustments to uncertain tax position accruals	0	0	(298)
Other, net	(9)	(33)	(23)
Total federal and foreign income taxes	$ 987	$ 997	$ 462