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Goodwill and Other Purchased Intangible Assets
12 Months Ended
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Purchased Intangible Assets
GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS
Goodwill
Goodwill and other purchased intangible assets are included in the identifiable assets of the segment to which the operations of the acquired entity have been assigned. Accumulated goodwill impairment losses at December 31, 2014 and 2013, totaled $570 million at the Aerospace Systems segment.
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.
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


Amortization expense for 2014, 2013 and 2012, was $22 million, $26 million and $36 million, respectively. The company’s purchased intangible assets are being amortized on a straight-line basis over an aggregate weighted-average period of 21 years and are included in other non-current assets in the consolidated statements of financial position. 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