Acquisitions, Divestitures, Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill by reporting unit during 2011 and 2012 were as follows:

	Aerospace			Combat Systems			Marine Systems		Information Systems and Technology			Total Goodwill
December 31, 2010	$	2,650		$	2,828		$	198	$	6,973		$	12,649
Acquisitions (a)	—			60			31		897			988
Other (b)	(6		)	(49		)	—		(6		)	(61		)
December 31, 2011	$	2,644		$	2,839		$	229	$	7,864		$	13,576
Impairment	—			—			—		(1,994		)	(1,994		)
Acquisitions (a)	11			86			61		221			379
Other (b)	42			36			—		9			87
December 31, 2012	$	2,697		$	2,961		$	290	$	6,100		$	12,048

(a)Includes adjustments during the purchase price allocation period.

(b)Consists primarily of adjustments for foreign currency translation.

Intangible Assets

Intangible assets consisted of the following:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	December 31, 2011							December 31, 2012
Contract and program intangible assets*	$	2,393	$	(1,060	)	$	1,333	$	2,066	$	(1,165	)	$	901
Trade names and trademarks	477		(70		)	407		494		(87		)	407
Technology and software	175		(110		)	65		180		(108		)	72
Other intangible assets	174		(166		)	8		175		(172		)	3
Total intangible assets	$	3,219	$	(1,406	)	$	1,813	$	2,915	$	(1,532	)	$	1,383

* Consists of acquired backlog and probable follow-on work and related customer relationships.

Amortization Lives (In Years) Of Intangible Assets

The amortization lives (in years) of our intangible assets on December 31, 2012, were as follows:

	Range of
	Amortization Life
Contract and program intangible assets	7-30
Trade names and trademarks	30
Technology and software	7-15
Other intangible assets	3-7

Expected Amortization Expense Over Next Five Years

We expect to record annual amortization expense over the next five years as follows:

2013	$	167
2014	142
2015	139
2016	110
2017	99