Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Sales and operating income by segment

The following table presents sales and operating income by segment:

	Year Ended December 31
$ in millions	2015			2014			2013
Sales
Aerospace Systems	$	10,004		$	9,997		$	10,014
Electronic Systems	6,842			6,951			7,149
Information Systems	5,894			6,222			6,596
Technical Services	2,838			2,799			2,843
Intersegment eliminations	(2,052		)	(1,990		)	(1,941		)
Total sales	23,526			23,979			24,661
Operating income
Aerospace Systems	1,220			1,315			1,215
Electronic Systems	1,068			1,148			1,226
Information Systems	616			611			633
Technical Services	254			261			262
Intersegment eliminations	(238		)	(236		)	(256		)
Total segment operating income	2,920			3,099			3,080
Reconciliation to operating income:
Net FAS/CAS pension adjustment	348			269			168
Unallocated corporate expenses	(190		)	(169		)	(119		)
Other	(2		)	(3		)	(6		)
Total operating income	$	3,076		$	3,196		$	3,123

Intersegment sales and operating income

The following table presents intersegment sales and operating income before eliminations:

	Year Ended December 31
$ in millions	2015					2014					2013
	Sales		Operating Income			Sales		Operating Income			Sales		Operating Income
Intersegment sales and operating income
Aerospace Systems	$	232		$	28	$	176		$	22	$	149		$	18
Electronic Systems	544			88		637			109		629			125
Information Systems	592			60		537			57		504			63
Technical Services	684			62		640			48		659			50
Total	$	2,052		$	238	$	1,990		$	236	$	1,941		$	256

Total assets by segment

The following table presents assets by segment:

	December 31
$ in millions	2015		2014
Assets
Aerospace Systems	$	7,061	$	6,844
Electronic Systems	4,394		4,366
Information Systems	6,588		6,725
Technical Services	1,528		1,539
Segment assets	19,571		19,474
Corporate assets(1)	4,883		7,098
Total assets	$	24,454	$	26,572

⁽¹⁾  Corporate assets principally consist of cash and cash equivalents and deferred tax assets.

Additional information by segment

The following table presents capital expenditures and depreciation and amortization by segment:

	Capital Expenditures						Depreciation and Amortization(1)
$ in millions	2015		2014		2013		2015		2014		2013
Aerospace Systems	$	240	$	387	$	198	$	213	$	206	$	210
Electronic Systems	111		82		76		120		119		134
Information Systems	28		40		27		65		70		81
Technical Services	2		1		3		6		7		4
Corporate	90		51		60		63		60		66
Total	$	471	$	561	$	364	$	467	$	462	$	495

⁽¹⁾  Depreciation and amortization expense includes amortization of purchased intangible assets, as well as amortization of deferred and other outsourcing costs.