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Acquisitions, Intangible Assets And Goodwill (Tables)
 6 Months Ended
Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible assets
Intangible assets consisted of the following:

 
Gross Carrying Amount
Accumulated Amortization
Net Carrying Amount
 
Gross Carrying Amount
Accumulated Amortization
Net Carrying Amount
 
December 31, 2012
 
June 30, 2013
Contract and program intangible assets*
$
2,066

$
(1,165
)
$
901

 
$
2,067

$
(1,239
)
$
828

Trade names and trademarks
494

(87
)
407

 
487

(96
)
391

Technology and software
180

(108
)
72

 
161

(113
)
48

Other intangible assets
175

(172
)
3

 
166

(163
)
3

Total intangible assets
$
2,915

$
(1,532
)
$
1,383

 
$
2,881

$
(1,611
)
$
1,270

* Consists of acquired backlog and probable follow-on work and related customer relationships.
Changes In The Carrying Amount Of Goodwill By Reporting Unit


The changes in the carrying amount of goodwill by reporting unit for the six months ended
June 30, 2013, were as follows:

 
Aerospace
 
Combat Systems
 
Marine Systems
 
Information Systems and Technology
 
Total Goodwill
December 31, 2012 (a)
$
2,697

 
$
2,961

 
$
290

 
$
6,100

 
$
12,048

Acquisitions (b)
—

 
2

 
—

 
2

 
4

Other (c)
(56
)
 
(66
)
 
—

 
(21
)
 
(143
)
June 30, 2013
$
2,641

 
$
2,897

 
$
290

 
$
6,081

 
$
11,909


(a)
Goodwill on December 31, 2012, in the Information Systems and Technology reporting unit is net of $1,994 of accumulated impairment losses.
(b)Includes adjustments during the purchase price allocation period.
(c)Consists primarily of adjustments for foreign currency translation.