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Goodwill and other intangible assets
9 Months Ended
Sep. 30, 2012
Goodwill and other intangible assets

Note 10. Goodwill and other intangible assets

A reconciliation of the change in the carrying value of goodwill for the nine months ended September 30, 2012 and the year ended December 31, 2011 follows (in millions).

 

     September 30,
2012
    December 31,
2011
 

Balance at beginning of year

   $ 53,213      $ 49,006   

Acquisitions of businesses

     1,064        4,179   

Other, including foreign currency translation

     (134     28   
  

 

 

   

 

 

 

Balance at end of period

   $ 54,143      $ 53,213   
  

 

 

   

 

 

 

Intangible assets other than goodwill are included in other assets and are summarized by type as follows (in millions).

 

     September 30, 2012      December 31, 2011  
     Gross carrying
amount
     Accumulated
amortization
     Gross carrying
amount
     Accumulated
amortization
 

Insurance and other

   $ 11,366       $ 2,826       $ 11,016       $ 2,319   

Railroad, utilities and energy

     2,101         861         2,088         623   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 13,467       $ 3,687       $ 13,104       $ 2,942   
  

 

 

    

 

 

    

 

 

    

 

 

 

Trademarks and trade names

   $ 2,684       $ 265       $ 2,655       $ 219   

Patents and technology

     4,984         1,927         4,900         1,496   

Customer relationships

     4,232         1,071         4,060         840   

Other

     1,567         424         1,489         387   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 13,467       $ 3,687       $ 13,104       $ 2,942   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

Amortization expense was $760 million for the first nine months of 2012 and $565 million for the first nine months of 2011. Intangible assets with indefinite lives as of September 30, 2012 and December 31, 2011 were $2,273 million and $2,250 million, respectively.