Goodwill and Other Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Changes in the carrying amounts of goodwill for the years ended December 31, 2014 and 2013, were as follows:

$ in millions	Aerospace Systems		Electronic Systems		Information Systems			Technical Services		Total
Balance as of December 31, 2012	$	3,758	$	2,410	$	5,287		$	976	$	12,431
Businesses acquired and other (1)	—		—		7			—		7
Balance as of December 31, 2013	$	3,758	$	2,410	$	5,294		$	976	$	12,438
Businesses acquired and other (1)	—		—		(8		)	36		28
Balance as of December 31, 2014	$	3,758	$	2,410	$	5,286		$	1,012	$	12,466

(1) Other consists primarily of adjustments for foreign currency translation.

Schedule of Purchased Intangible Assets

Net contract, program, and other intangible assets comprise the following:

	December 31
$ in millions	2014			2013
Gross contract, program and other intangible assets	$	1,831		$	1,812
Less accumulated amortization	(1,730		)	(1,708		)
Net contract, program and other intangible assets	$	101		$	104

Expected Future Amortization of Purchased Intangibles

As of December 31, 2014, the expected future amortization of purchased intangibles for each of the next five years is as follows:

$ in millions
Year Ending December 31
2015	$	22
2016	16
2017	14
2018	12
2019	10