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Goodwill and other intangible assets
6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and other intangible assets

Note 13. Goodwill and other intangible assets

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

 

      June 30, 
2017
      December 31, 
2016
 

Balance at beginning of year

    $ 79,486      $ 62,708  

Acquisitions of businesses

     616        17,650  

Other, including foreign currency translation

     73        (872
  

 

 

    

 

 

 

Balance at end of period

    $  80,175       $  79,486  
  

 

 

    

 

 

 

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

 

    June 30, 2017       December 31, 2016
    Gross carrying
amount
          Accumulated
amortization
      Gross carrying
amount
      Accumulated
amortization

Insurance and other

      $40,419                   $7,199                   $39,976                     $6,495    

Railroad, utilities and energy

      903                   312                   898                     293    
   

 

 

                 

 

 

                 

 

 

                 

 

 

     
      $41,322                   $7,511                   $40,874                     $6,788    
   

 

 

                 

 

 

                 

 

 

                 

 

 

     

Trademarks and trade names

      $  5,275                   $   653                   $  5,175                     $   616    

Patents and technology

      4,435                   2,512                   4,341                     2,328    

Customer relationships

      28,457                   3,299                   28,243                     2,879    

Other

      3,155                   1,047                   3,115                     965    
   

 

 

                 

 

 

                 

 

 

                 

 

 

     
      $41,322                   $7,511                   $40,874                     $6,788    
   

 

 

                 

 

 

                 

 

 

                 

 

 

     

Amortization expense in the first six months was $740 million in 2017 and $716 million in 2016. Intangible assets with indefinite lives were approximately $18.8 billion as of June 30, 2017 and $18.7 billion as of December 31, 2016.