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Goodwill and other intangible assets
3 Months Ended
Mar. 31, 2013
Goodwill and other intangible assets

Note 10. Goodwill and other intangible assets

A reconciliation of the change in the carrying value of goodwill is as follows (in millions).

 

     March 31,     December 31,  
     2013     2012  

Balance at beginning of year

   $ 54,523      $ 53,213   

Acquisitions of businesses

     14        1,442   

Other, including foreign currency translation

     (130     (132
  

 

 

   

 

 

 

Balance at end of period

   $ 54,407      $ 54,523   
  

 

 

   

 

 

 

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

 

     March 31, 2013      December 31, 2012  
     Gross carrying
amount
     Accumulated
amortization
     Gross carrying
amount
     Accumulated
amortization
 

Insurance and other

   $ 11,669       $ 3,143       $ 11,737       $ 2,994   

Railroad, utilities and energy

     2,163         990         2,163         913   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 13,832       $ 4,133       $ 13,900       $ 3,907   
  

 

 

    

 

 

    

 

 

    

 

 

 

Trademarks and trade names

   $ 2,799       $ 293       $ 2,819       $ 278   

Patents and technology

     5,005         2,179         5,014         2,059   

Customer relationships

     4,532         1,241         4,565         1,155   

Other

     1,496         420         1,502         415   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 13,832       $ 4,133       $ 13,900       $ 3,907   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

Amortization expense was $264 million for the first quarter of 2013 and $254 million for the first quarter of 2012. Intangible assets with indefinite lives as of March 31, 2013 and December 31, 2012 were $2,325 million and $2,328 million, respectively.