Goodwill and Other Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2010

Goodwill And Other Purchased Intangible Assets (Table) [Abstract]

Goodwill

	Aerospace		Electronic			Information			Technical
$ in millions	Systems		Systems			Systems			Services		Total
Balance as of January 1, 2009	$	3,748	$	2,428		$	5,390		$	802	$	12,368
Goodwill transferred due to segment realignment		41		(26	)		(138	)		123		–
Goodwill acquired		5										5
Other		7					(4	)				3
Balance as of December 31, 2009 and 2010	$	3,801	$	2,402		$	5,248		$	925	$	12,376

Purchased intangible assets

	December 31, 2010							December 31, 2009
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
$ in millions	Amount		Amortization			Amount		Amount		Amortization			Amount
Contract and program intangibles	$	1,705	$	(1,531	)	$	174	$	1,705	$	(1,464	)	$	241
Other purchased intangibles		100		(82	)		18		100		(78	)		22
Total	$	1,805	$	(1,613	)	$	192	$	1,805	$	(1,542	)	$	263

Expected amortization for purchased intangibles

$ in millions
Year ending December 31
2011	$	38
2012		36
2013		29
2014		16
2015		15