Segment Information (Tables)

12 Months Ended

Dec. 31, 2010

Segment Information (Table) [Abstract]

Sales and service revenues by segment

	Year Ended December 31
$ in millions	2010			2009			2008
Sales and Service Revenues
Aerospace Systems	$	10,910		$	10,419		$	9,825
Electronic Systems		7,613			7,671			7,048
Information Systems		8,395			8,536			8,174
Technical Services		3,230			2,776			2,535
Intersegment eliminations		(2,005	)		(1,752	)		(1,331	)
Total sales and service revenues	$	28,143		$	27,650		$	26,251

Reconciliation of segment operating income to total operating income

	Year Ended December 31
$ in millions	2010			2009			2008
Operating Income
Aerospace Systems	$	1,256		$	1,071		$	416
Electronic Systems		1,023			969			947
Information Systems		756			624			626
Technical Services		206			161			144
Intersegment eliminations		(231	)		(190	)		(118	)
Total Segment Operating Income		3,010			2,635			2,015
Non-segment factors affecting operating income
Unallocated corporate expenses		(182	)		(100	)		(141	)
Net pension adjustment		10			(237	)		272
Royalty income adjustment		(11	)		(24	)		(70	)
Total operating income	$	2,827		$	2,274		$	2,076

Intersegment sales and operating income

	Year Ended December 31
$ in millions	2010				2009				2008
			Operating				Operating				Operating
	Sales		Income		Sales		Income		Sales		Income
Intersegment sales and operating income
Aerospace Systems	$	132	$	13	$	121	$	13	$	129	$	8
Electronic Systems		684		118		650		103		482		63
Information Systems		623		61		474		44		354		28
Technical Services		566		39		507		30		366		19
Total intersegment sales and operating income	$	2,005	$	231	$	1,752	$	190	$	1,331	$	118

Total assets by segment

	December 31
$ in millions	2010		2009		2008
Assets
Aerospace Systems	$	6,548	$	6,291	$	6,199
Electronic Systems		4,893		4,950		5,024
Information Systems		7,467		7,422		9,029
Technical Services		1,381		1,295		1,184
Segment assets		20,289		19,958		21,436
Corporate		6,030		5,425		4,074
Assets of discontinued operations		5,212		5,035		4,687
Total assets	$	31,531	$	30,418	$	30,197

Additional Information by Segment

	Year Ended December 31
$ in millions	2010		2009		2008
Capital Expenditures
Aerospace Systems	$	195	$	211	$	224
Electronic Systems		176		168		148
Information Systems		31		50		54
Technical Services		5		3		4
Corporate		172		41		33
Total capital expenditures from continuing operations	$	579	$	473	$	463

	Year Ended December 31
$ in millions	2010		2009		2008
Depreciation and Amortization
Aerospace Systems	$	237	$	238	$	238
Electronic Systems		150		140		149
Information Systems		133		138		145
Technical Services		5		8		8
Corporate		30		26		23
Total depreciation and amortization from continuing operations	$	555	$	550	$	563