Goodwill and Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Identifiable Intangible Assets [Abstract]

Goodwill

	C3ISR			Government Services			AM&M			Electronic Systems			Consolidated Total
	(in millions)
Balance at December 31, 2009	$	870		$	2,320		$	1,158		$	3,842		$	8,190
Business acquisitions		—			—			—			530			530
Sale of a business		—			—			—			(2	)		(2	)
Foreign currency translation ( 1 )		(2	)		(1	)		14			1			12
Segment reclassification		—			(34	)		—			34			—
Balance at December 31, 2010	$	868		$	2,285		$	1,172		$	4,405		$	8,730
Business acquisitions		3			—			2			22			27
Impairment loss		—			—			—			(43	)		(43	)
Foreign currency translation ( 1 )		—			—			(5	)		(12	)		(17	)
Segment reclassification ( 2 )		(5	)		(94	)		—			99			—
Balance at December 31, 2011	$	866		$	2,191		$	1,169		$	4,471		$	8,697

⁽¹⁾  The changes in goodwill from foreign currency translation adjustments are due to fluctuations in the U.S. dollar and foreign currency exchange rates. The decrease in goodwill presented in the AM&M and Electronic Systems segments during 2011 was primarily due to the strengthening of the U.S. dollar against the Canadian dollar and the Euro. The decreases in goodwill presented in the C ³ISR and Government Services reportable segments during 2010 were due to the strengthening of the U.S. dollar against the British pound. The increases in goodwill presented in the AM&M and Electronic Systems reportable segments during 2010 were primarily due to the weakening of the U.S. dollar against the Canadian dollar.

⁽²⁾  As a result of re-alignments of business units in the Company’s management and organizational structure as discussed in Note 2, goodwill was reclassified on a relative fair value basis among the C³ISR, Government Services and Electronic Systems segments during the quarter ended April 1, 2011.

Identifiable Intangible Assets

	December 31, 2011								December 31, 2010
	Weighted Average Amortization Period		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	(in years)						(in millions)
Customer contractual relationships		23	$	584	$	252	$	332	$	584	$	205	$	379
Technology		11		149		87		62		145		72		73
Other		15		29		13		16		28		10		18
Total		21	$	762	$	352	$	410	$	757	$	287	$	470

Amortization expense

	Year Ended December 31,
	2011		2010		2009
	(in millions)
Amortization expense	$	65	$	59	$	52

Estimated amortization expense

	Year Ending December 31,
	2012		2013		2014		2015		2016
	(in millions)
Estimated amortization expense	$	54	$	43	$	44	$	39	$	31