Acquisitions, Divestitures, Goodwill and Intangible Assets - Changes In Amount Of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 12,048		$ 13,576
Goodwill impairment	0		(1,994)		0
Acquisitions	2	[1]	379	[1]
Other	(73)	[2]	87	[2]
Goodwill, end of period	11,977		12,048		13,576
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	2,697		2,644
Goodwill impairment			0
Acquisitions	0	[1]	11	[1]
Other	44	[2]	42	[2]
Goodwill, end of period	2,741		2,697
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	2,961		2,839
Goodwill impairment			0
Acquisitions	2	[1]	86	[1]
Other	(69)	[2]	36	[2]
Goodwill, end of period	2,894		2,961
Percentage of expected cash flows exceeding carrying value	10.00%
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	290		229
Goodwill impairment			0
Acquisitions	(1)	[1]	61	[1]
Other	0	[2]	0	[2]
Goodwill, end of period	289		290
Information Systems and Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	6,100		7,864
Goodwill impairment			(1,994)
Acquisitions	1	[1]	221	[1]
Other	(48)	[2]	9	[2]
Goodwill, end of period	$ 6,053		$ 6,100
Percentage of expected cash flows exceeding carrying value			15.00%

[1] Includes adjustments during the purchase price allocation period.

[2] Consists primarily of adjustments for foreign currency translation and allocations of goodwill associated with asset sales.