Goodwill and Other Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying amounts of goodwill for the years ended December 31, 2013 and 2012, were as follows:

$ in millions	Aerospace Systems			Electronic Systems		Information Systems		Technical Services		Total
Balance as of December 31, 2011		$3,801			$2,400		$5,248		$925		$12,374
Businesses acquired, sold and other	(43		)	10		39		51		57
Balance as of December 31, 2012		$3,758			$2,410		$5,287		$976		$12,431
Businesses acquired	—			—		7		—		7
Balance as of December 31, 2013		$3,758			$2,410		$5,294		$976		$12,438

Schedule of Purchased Intangible Assets

Net contract, program, and other intangible assets were comprised of the following:

	December 31
$ in millions	2013			2012
Gross contract, program and other intangible assets		$ 1,812			$ 1,819
Less accumulated amortization	(1,708		)	(1,682		)
Net contract, program and other intangible assets	$ 104				$ 137

Expected Future Amortization of Purchased Intangibles

As of December 31, 2013, the expected future amortization of purchased intangibles for each of the next five years is as follows:

$ in millions
Year Ending December 31
2014		$20
2015	18
2016	12
2017	10
2018	9