Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

SEGMENT INFORMATION [Abstract]

Sales and service revenues by segment

	Year Ended December 31
$ in millions	2011				2010				2009
Sales and Service Revenues
Aerospace Systems		$	10,458			$	10,910			$	10,419
Electronic Systems			7,372				7,613				7,671
Information Systems			7,921				8,395				8,536
Technical Services			2,699				3,230				2,776
Intersegment eliminations			(2,038	)			(2,005	)			(1,752	)
Total sales and service revenues		$	26,412			$	28,143			$	27,650

Reconciliation of segment operating income to total operating income

	Year Ended December 31
$ in millions	2011				2010				2009
Operating Income
Aerospace Systems		$	1,261			$	1,256			$	1,071
Electronic Systems			1,070				1,023				969
Information Systems			766				756				624
Technical Services			216				206				161
Intersegment eliminations			(258	)			(231	)			(190	)
Total Segment Operating Income			3,055				3,010				2,635
Non-segment factors affecting operating income
Unallocated corporate expenses			(166	)			(182	)			(100	)
Net pension adjustment			400				10				(237	)
Royalty income adjustment			(13	)			(11	)			(24	)
Total operating income		$	3,276			$	2,827			$	2,274

Intersegment sales and operating income

	Year Ended December 31
$ in millions	2011					2010					2009
			Sales		Operating Income			Sales		Operating Income			Sales		Operating Income
Intersegment sales and operating income
Aerospace Systems		$	134	$	18		$	132	$	13		$	121	$	13
Electronic Systems			649		131			684		118			650		103
Information Systems			687		68			623		61			474		44
Technical Services			568		41			566		39			507		30
Total intersegment sales and operating income		$	2,038	$	258		$	2,005	$	231		$	1,752	$	190

Total assets by segment

	December 31
$ in millions	2011			2010
Assets
Aerospace Systems		$	6,574		$	6,548
Electronic Systems			4,705			4,893
Information Systems			7,144			7,467
Technical Services			1,303			1,381
Segment assets			19,726			20,289
Corporate (See Note 10)			5,685			5,909
Assets of discontinued operations						5,212
Total assets		$	25,411		$	31,410

Additional information by segment

	Year Ended December 31
$ in millions	2011			2010			2009
Capital Expenditures from Continuing Operations
Aerospace Systems		$	184		$	195		$	211
Electronic Systems			121			176			168
Information Systems			41			31			50
Technical Services			1			5			3
Corporate			141			172			41
Total capital expenditures from continuing operations		$	488		$	579		$	473

	Year Ended December 31
$ in millions	2011			2010			2009
Depreciation and Amortization
Aerospace Systems		$	200		$	237		$	238
Electronic Systems			144			150			140
Information Systems			121			133			138
Technical Services			4			5			8
Corporate			75			30			26
Total depreciation and amortization from continuing operations		$	544		$	555		$	550