Acquisitions, Divestitures, Intangible Assets And Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Acquisitions, Divestitures, Intangible Assets And Goodwill [Abstract]

Intangible Assets

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
		December 31, 2010						December 31, 2011
Contract and program intangible assets*		$ 2,421		$    (949)		$ 1,472		$ 2,393		$ (1,060)		$ 1,333
Trade names and trademarks		483		(58)		425		477		(70)		407
Technology and software		176		(94)		82		175		(110)		65
Other intangible assets		207		(194)		13		174		(166)		8
Total intangible assets		$ 3,287		$ (1,295)		$ 1,992		$ 3,219		$ (1,406)		$ 1,813

* Consists of acquired backlog and probable follow-on work and related customer relationships. December 31, 2011 amount includes impact of $111 impairment of completions business intangible asset in our Aerospace group.

Amortization Lives (In Years) Of Intangible Assets

	Range of Amortization Life	Weighted Average     Amortization Life
Contract and program intangible assets	7-30	17
Trade names and trademarks	30	30
Technology and software	7-13	11
Other intangible assets	7-15	11
Total intangible assets		19

Annual Amortization Expense Over The Next Five Years

2012	$	225
2013		182
2014		159
2015		155
2016		128

Changes In The Carrying Amount Of Goodwill By Reporting Unit

	Aerospace			Combat Systems			Marine Systems		Information Systems and Technology		Total Goodwill
December 31, 2009		$  2,480			$  2,710			$  198		$  6,881		$  12,269
Acquisitions		–			57			–		76		133
Other*		170			61			–		16		247
December 31, 2010		2,650			2,828			198		6,973		12,649
Acquisitions		–			60			31		897		988
Other*		(6	)		(49	)		–		(6)		(61)
December 31, 2011		$  2,644			$  2,839			$  229		$  7,864		$  13,576

* Consists primarily of adjustments for foreign currency translation.