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Goodwill and acquisition-related intangibles
6 Months Ended
Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and acquisition-related intangibles
Goodwill and acquisition-related intangibles
Goodwill was $4.362 billion net of accumulated impairment of $90 million as of June 30, 2013, and December 31, 2012. There was no impairment of goodwill during the six months ended June 30, 2013. The following table shows the components of acquisition-related intangible assets as of June 30, 2013, and December 31, 2012:

 
 
 
 
June 30, 2013
 
December 31, 2012
Acquisition-related Intangibles
 
Amortization Period (Years)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
Developed technology
 
5 - 10
 
$
2,145

 
$
413

 
$
1,732

 
$
2,145

 
$
312

 
$
1,833

Customer relationships
 
5 - 8
 
821

 
188

 
633

 
821

 
137

 
684

Other intangibles
 
2 - 5
 
17

 
13

 
4

 
46

 
36

 
10

In-process R&D
 
(a)
 
19

 
n/a

 
19

 
31

 
n/a

 
31

Total
 
 
 
$
3,002

 
$
614

 
$
2,388

 
$
3,043

 
$
485

 
$
2,558

(a) In-process R&D is not amortized until the associated project has been completed. Alternatively, if the associated project is determined not to be viable, it will be expensed.

Amortization of acquisition-related intangibles was $85 million and $86 million for the three months ($170 million and $171 million for the six months) ended June 30, 2013 and 2012.