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Other investments (Tables)
 6 Months Ended
Jun. 30, 2017
Investments, All Other Investments [Abstract]  
Schedule of other investments

Other investments are classified as available-for-sale and carried at fair value and are shown in our Consolidated Balance Sheets as follows (in millions).

 

     Cost          Fair Value  
      June 30, 
2017		       December 31, 
2016		           June 30, 
2017		       December 31, 
2016		  

Insurance and other

     $   6,720       $ 6,720         $   16,838       $ 14,364  

Finance and financial products

      1,000        1,000          3,396        2,892  
  

 

 

     

 

 

       

 

 

     

 

 

  
    $   7,720       $ 7,720         $   20,234       $ 17,256