Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	$ 32,253	$ 28,921
Accumulated depreciation	(7,076)	(6,252)
Property, plant and equipment, net	25,177	22,669
Property, Plant and Equipment (Textual)
Property, plant and equipment, capital leases	77	59
Accumulated amortization on assets under capital leases	(26)	(22)
Depreciation expense related to continuing operations	1,100	985	919
Land [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	722	624
Crude Oil Processing Facilities (Member)
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	23,322	21,421
Pipeline and Terminal Facilities [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	856	709
Grain Processing Equipment [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	673	656
Retail Facilities (Member)
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	1,346	1,277
Administrative Buildings (Member)
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	712	705
Other [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	1,290	1,226
Construction in Progress [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, at cost	$ 3,332	$ 2,303