Goodwill and Other Purchased Intangible Assets (Unaudited)

9 Months Ended

Sep. 30, 2011

GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS [Abstract]

8. GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS

8.    GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS

Goodwill

The carrying amounts of goodwill at both September 30, 2011, and December 31, 2010, were as follows:

$ in millions	Aerospace Systems		Electronic Systems		Information Systems		Technical Services		Total
Goodwill		$3,801		$2,402		$5,248		$925		$12,376

Accumulated goodwill impairment losses at September 30, 2011, and December 31, 2010, totaled $570 million at the Aerospace Systems segment.

Purchased Intangible Assets

The table below summarizes the company’s aggregate purchased intangible assets:

	September 30, 2011							December 31, 2010
$ in millions	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Contract and program intangibles		$1,705		$(1,554	)		$151		$1,705		$(1,531	)		$174
Other purchased intangibles		100		(87	)		13		100		(82	)		18
Total		$1,805		$(1,641	)		$164		$1,805		$(1,613	)		$192

The company’s purchased intangible assets are subject to amortization and have been amortized on a straight-line basis over an original aggregate weighted-average period of 18 years. Aggregate amortization expense for the three and nine months ended September 30, 2011, was $10 million and $28 million, respectively. Aggregate amortization expense for the three and nine months ended September 30, 2010, was $17 million and $53 million, respectively.

The table below shows expected amortization for purchased intangibles for the remainder of 2011 and for the next five years:

$ in millions
Year ending December 31
2011 (October 1—December 31)	$	9
2012		36
2013		29
2014		16
2015		15
2016		11