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Other Income, Net (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jul. 24, 2015
Gain on asset and investment sales, net $ 66 $ 41 $ 109 $ 92  
Gain on deconsolidation of TMAC 76   76    
Refinery income, net 1 13 9 22  
Foreign currency exchange, net 23 20 26 (5)  
Impairment of investments (29) (3) (102) (4)  
Other 3 8 10 23  
Other Income, net $ 140 $ 79 $ 128 $ 128  
EGR          
Ownership interest sold (as a percent) 60.64%   60.64%    
Disposal by sale | EGR          
Gain on disposal $ 53        
Ownership interest sold (as a percent)         60.64%