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Goodwill and acquisition-related intangibles
9 Months Ended
Sep. 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 September 30, 2013, and December 31, 2012. There was no impairment of goodwill during the three months and nine months ended September 30, 2013. The following table shows the components of acquisition-related intangible assets as of September 30, 2013, and December 31, 2012:

 
 
 
 
September 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
 
$
2,153

 
$
469

 
$
1,684

 
$
2,145

 
$
312

 
$
1,833

Customer relationships
 
5 - 8
 
820

 
213

 
607

 
821

 
137

 
684

Other intangibles
 
5
 
5

 
3

 
2

 
46

 
36

 
10

In-process R&D
 
(a)
 
12

 
n/a

 
12

 
31

 
n/a

 
31

Total
 
 
 
$
2,990

 
$
685

 
$
2,305

 
$
3,043

 
$
485

 
$
2,558

(a) In-process R&D is not amortized until the associated project has been successfully completed, at which point it would be reclassified to developed technology. Alternatively, if the associated project is determined not to be viable, it will be expensed.

Amortization of acquisition-related intangibles was $83 million and $86 million for the three months ($253 million and $257 million for the nine months) ended September 30, 2013 and 2012.