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Acquisitions and Divestitures, Goodwill, and Intangible Assets (Tables)
 3 Months Ended
Apr. 03, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes In The Carrying Amount Of Goodwill By Reporting Unit
The changes in the carrying amount of goodwill by reporting unit for the three months ended April 3, 2016, were as follows:
 
Aerospace
 
Combat Systems
 
Information Systems and Technology
 
Marine Systems
 
Total
Goodwill
December 31, 2015 (a)
$
2,542

 
$
2,591

 
$
6,021

 
$
289

 
$
11,443

Acquisitions (b)
17

 
—

 
—

 
—

 
17

Other (c)
68

 
57

 
10

 
—

 
135

April 3, 2016
$
2,627

 
$
2,648

 
$
6,031

 
$
289

 
$
11,595

(a)Goodwill on December 31, 2015, in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.
(b)Includes adjustments during the purchase price allocation period.
(c)Consists primarily of adjustments for foreign currency translation.
Intangible Assets
Intangible assets consisted of the following:
 
Gross Carrying Amount (a)
Accumulated Amortization
Net Carrying Amount
 
Gross Carrying Amount (a)
Accumulated Amortization
Net Carrying Amount
 
April 3, 2016
 
December 31, 2015
Contract and program intangible assets (b)
$
1,634

$
(1,236
)
$
398

 
$
1,626

$
(1,214
)
$
412

Trade names and trademarks
472

(134
)
338

 
455

(127
)
328

Technology and software
120

(97
)
23

 
119

(96
)
23

Other intangible assets
154

(154
)
—

 
154

(154
)
—

Total intangible assets
$
2,380

$
(1,621
)
$
759

 
$
2,354

$
(1,591
)
$
763

(a)
Change in gross carrying amounts consists primarily of adjustments for foreign currency translation and acquired intangible assets.
(b)
Consists of acquired backlog and probable follow-on work and associated customer relationships.