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Intangible Assets and Goodwill
6 Months Ended
Jul. 01, 2012
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 2011. 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 certain indefinite lived intangible assets in the fiscal second quarter of 2012.

(Dollars in Millions)
 
July 1, 2012
 
January 1, 2012
Intangible assets with definite lives:
 
 
 
 
Patents and trademarks — gross
 
$
8,778

 
7,947

Less accumulated amortization
 
3,196

 
2,976

Patents and trademarks — net
 
5,582

 
4,971

Customer relationships and other intangibles — gross
 
18,227

 
8,716

Less accumulated amortization
 
3,560

 
3,432

Customer relationships and other intangibles — net
 
14,667

 
5,284

Intangible assets with indefinite lives:
 
 
 
 
Trademarks
 
7,356

 
6,034

Purchased in-process research and development
 
1,594

 
1,849

Total intangible assets with indefinite lives
 
8,950

 
7,883

Total intangible assets — net
 
$
29,199

 
18,138



Goodwill as of July 1, 2012 was allocated by segment of business as follows:
(Dollars in Millions)
 
Consumer
 
Pharm
 
Med Dev & Diag
 
Total
Goodwill, net at January 1, 2012
 
$
8,298

 
1,721

 
6,119

 
16,138

Acquisitions
 

 
48

 
5,397

 
5,445

Currency translation/Other
 
(119
)
 
(27
)
 
(25
)
 
(171
)
Goodwill, net as of July 1, 2012
 
$
8,179

 
1,742

 
11,491

 
21,412



The weighted average amortization periods for patents and trademarks and customer relationships and other intangible assets are 17 years and 23 years, respectively. The amortization expense of amortizable intangible assets for the fiscal six months ended July 1, 2012 was $488 million, and the estimated amortization expense for the five succeeding years approximates $1,340 million, before tax, per year. Amortization expense is included in cost of products sold.

Intangible assets and goodwill increased by $12.9 billion and $5.4 billion respectively, related to the Synthes acquisition. The increase in intangible assets was partially offset by $0.9 billion in intangible asset write-downs and a $0.4 billion impairment of purchased in-process research and development. See Note 10 to the Consolidated Financial Statements for additional details on Synthes.