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Goodwill and other intangible assets
3 Months Ended
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and other intangible assets

Note 12. Goodwill and other intangible assets

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

 

     March 31,
2016
    December 31,
2015
 

Balance at beginning of year

   $ 62,708     $ 60,714       

Acquisitions of businesses

     16,617       2,563       

Other, including foreign currency translation

     (211     (569)      
  

 

 

   

 

 

 

Balance at end of period

   $ 79,114     $ 62,708       
  

 

 

   

 

 

 

Other intangible assets are summarized as follows (in millions).

 

     March 31, 2016    December 31, 2015
     Gross carrying
amount
   Accumulated
amortization
   Gross carrying
amount
   Accumulated
amortization

Insurance and other

     $ 41,073        $ 5,806        $ 14,610        $ 5,462  

Railroad, utilities and energy

       892          252          888          239  
    

 

 

      

 

 

      

 

 

      

 

 

 
     $ 41,965        $ 6,058        $ 15,498        $ 5,701  
    

 

 

      

 

 

      

 

 

      

 

 

 

Trademarks and trade names

     $ 6,036        $ 782        $ 3,041        $ 765  

Patents and technology

       4,332          2,148          4,252          2,050  

Customer relationships

       28,504          2,304          5,474          2,131  

Other

       3,093          824          2,731          755  
    

 

 

      

 

 

      

 

 

      

 

 

 
     $ 41,965        $ 6,058        $ 15,498        $ 5,701  
    

 

 

      

 

 

      

 

 

      

 

 

 

Other intangible assets at March 31, 2016 included preliminary fair values of intangible assets of PCC and Duracell of approximately $26 billion, which included approximately $17 billion in customer relationships and trade names that were preliminarily determined to have indefinite lives. Amortization expense in the first quarter was $339 million in 2016 and $255 million in 2015. Intangible assets with indefinite lives, excluding business acquisitions completed in 2016, were approximately $3.0 billion as of March 31, 2016 and December 31, 2015.