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Intangible Assets and Goodwill
6 Months Ended
Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
INTANGIBLE ASSETS AND GOODWILL
INTANGIBLE ASSETS AND GOODWILL

Intangible assets that have finite useful lives are amortized over their estimated useful lives. The latest impairment assessment of goodwill and indefinite lived intangible assets was completed in the fiscal fourth quarter of 2012. Future impairment tests for goodwill and indefinite lived intangible assets will be performed annually in the fiscal fourth quarter, or sooner if warranted, as was the case for the Acclarent IPR&D in the fiscal first quarter of 2013.

(Dollars in Millions)
 
June 30, 2013
 
December 30, 2012
Intangible assets with definite lives:
 
 
 
 
Patents and trademarks — gross
 
$
8,878

 
8,890

Less accumulated amortization
 
3,647

 
3,416

Patents and trademarks — net
 
5,231

 
5,474

Customer relationships and other intangibles — gross
 
18,539

 
18,755

Less accumulated amortization
 
4,410

 
4,030

Customer relationships and other intangibles — net
 
14,129

 
14,725

Intangible assets with indefinite lives:
 
 
 
 
Trademarks
 
7,501

 
7,648

Purchased in-process research and development
 
843

 
905

Total intangible assets with indefinite lives
 
8,344

 
8,553

Total intangible assets — net
 
$
27,704

 
28,752



Goodwill as of June 30, 2013 was allocated by segment of business as follows:
(Dollars in Millions)
 
Consumer
 
Pharm
 
Med Dev & Diag
 
Total
Goodwill, net at December 30, 2012
 
$
8,519

 
1,792

 
12,113

 
22,424

Acquisitions
 
80

 

 
9

 
89

Currency translation/Other
 
(188
)
 
(14
)
 
26

 
(176
)
Goodwill, net as of June 30, 2013
 
$
8,411

 
1,778

 
12,148

 
22,337



The weighted average amortization periods for patents and trademarks and customer relationships and other intangible assets are 17 years and 24 years, respectively. The amortization expense of amortizable intangible assets was $653 million and $488 million for the fiscal six months ended June 30, 2013 and July 1, 2012, respectively. The estimated amortization expense for the five succeeding years approximates $1,300 million, before tax, per year. Amortization expense is included in cost of products sold.