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Goodwill and other intangible assets
3 Months Ended
Mar. 31, 2018
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,
2018
     December 31,
2017
 

Balance at beginning of year

    $     81,258       $     79,486  

Acquisitions of businesses

     52        1,545  

Other, including foreign currency translation

     27        227  
  

 

 

    

 

 

 

Balance at end of period

    $ 81,337       $ 81,258  
  

 

 

    

 

 

 

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

 

     March 31, 2018      December 31, 2017  
     Gross carrying
amount
     Accumulated
amortization
     Gross carrying
amount
     Accumulated
amortization
 

Insurance and other

     $ 40,317          $ 8,057          $  40,225          $ 7,707    

Railroad, utilities and energy

     993          334          988          324    
  

 

 

    

 

 

    

 

 

    

 

 

 
     $ 41,310          $ 8,391          $ 41,213          $ 8,031    
  

 

 

    

 

 

    

 

 

    

 

 

 

Trademarks and trade names

     $ 5,394          $ 710          $ 5,381          $ 692    

Patents and technology

     4,383          2,579          4,341          2,493    

Customer relationships

     28,353          3,943          28,322          3,722    

Other

     3,180          1,159          3,169          1,124    
  

 

 

    

 

 

    

 

 

    

 

 

 
     $  41,310          $  8,391          $ 41,213          $ 8,031    
  

 

 

    

 

 

    

 

 

    

 

 

 

Amortization expense in the first quarter was $352 million in 2018 and $367 million in 2017. Intangible assets with indefinite lives were approximately $18.9 billion as of March 31, 2018 and December 31, 2017.