Acquisitions, Divestitures, Intangible Assets And Goodwill (Changes In The Carrying Amount Of Goodwill By Reporting Unit) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended														12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011 Aerospace [Member]		Dec. 31, 2010 Aerospace [Member]		Dec. 31, 2011 Combat Systems [Member]		Dec. 31, 2010 Combat Systems [Member]		Dec. 31, 2011 Marine Systems [Member]	Dec. 31, 2009 Marine Systems [Member]	Dec. 31, 2011 Information Systems And Technology [Member]		Dec. 31, 2010 Information Systems And Technology [Member]
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Goodwill, beginning of period	$ 12,649		$ 12,269		$ 2,650		$ 2,480		$ 2,828		$ 2,710		$ 198	$ 198	$ 6,973		$ 6,881
Acquisitions	988		133						60		57		31		897		76
Other	(61)	[1]	247	[1]	(6)	[1]	170	[1]	(49)	[1]	61	[1]			(6)	[1]	16	[1]
Goodwill, end of period	$ 13,576		$ 12,649		$ 2,644		$ 2,650		$ 2,839		$ 2,828		$ 229	$ 198	$ 7,864		$ 6,973

[1] Consists primarily of adjustments for foreign currency translation.