Goodwill and Other Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Changes in the carrying amounts of goodwill for the years ended December 31, 2015 and 2014, were as follows:

$ in millions	Aerospace Systems		Electronic Systems		Information Systems			Technical Services			Total
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
Businesses acquired and other(1)	—		—		(2		)	(4		)	(6		)
Balance as of December 31, 2015	$	3,758	$	2,410	$	5,284		$	1,008		$	12,460

⁽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	2015			2014
Gross contract, program and other intangible assets	$	1,828		$	1,831
Less accumulated amortization	(1,751		)	(1,730		)
Net contract, program and other intangible assets	$	77		$	101

Expected Future Amortization of Purchased Intangibles

As of December 31, 2015, the expected future amortization of purchased intangibles for each of the next five years is as follows:

$ in millions
Year Ending December 31
2016	$	16
2017	14
2018	12
2019	10
2020	6