Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	31.80%	33.30%	32.30%
Income Tax Reconciliation (Table Amounts) [Abstract]
Income tax expense on continuing operations at statutory rate	$ 1,002	$ 1,038	$ 1,079
Manufacturing deduction	(63)	(42)	(32)
Research tax credit	(37)	0	(17)
Other, net	9	(9)	(33)
Total federal and foreign income taxes	$ 911	$ 987	$ 997