Income Taxes (Net Provision For Income Taxes For Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Current:
U.S. federal	$ 892		$ 951		$ 951
State	(9)	[1]	20	[1]	7	[1]
International	138		181		148
Total current	1,021		1,152		1,106
Deferred:
U.S. federal	(172)		87		60
State	(5)	[1]	0	[1]	3	[1]
International	29		(73)		(7)
Total deferred	(148)		14		56
Provision for income taxes, net	873		1,166		1,162
Net income tax payments	$ 1,155		$ 1,083		$ 1,060

[1] The provision for state and local income taxes that is allocable to U.S. government contracts is included in operating costs and expenses in the Consolidated Statements of Earnings (Loss) and, therefore, not included in the provision above.