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Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost $ 34,132 $ 32,253  
Accumulated depreciation (7,832) (7,076)  
Property, plant and equipment, net 26,300 25,177  
Property, Plant and Equipment (Textual)      
Property, plant and equipment, capital leases 83 77  
Accumulated amortization on assets under capital leases (35) (26)  
Depreciation expense related to continuing operations 1,100 1,100 985
Land [Member]
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 802 722  
Crude Oil Processing Facilities (Member)
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 24,865 23,322  
Pipeline and Terminal Facilities [Member]
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 1,471 856  
Grain Processing Equipment [Member]
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 694 673  
Retail Facilities (Member)
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 1,480 1,346  
Administrative Buildings (Member)
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 734 712  
Other [Member]
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost 1,457 1,290  
Construction in Progress [Member]
      
Property, Plant and Equipment, Net      
Property, plant and equipment, at cost $ 2,629 $ 3,332