Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 37,733	$ 36,907
Accumulated depreciation	(11,261)	(10,204)
Property, plant, and equipment, net	26,472	26,703
Property, Plant, and Equipment (Textual)
Property, plant, and equipment, assets under capital leases	118	134
Accumulated amortization on assets under capital leases	45	50
Depreciation expense related to continuing operations	1,300	1,300	$ 1,200
Land [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	400	400
Crude Oil Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	29,754	28,688
Transportation and Terminaling Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	3,692	3,642
Grain Processing Equipment [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	855	792
Administrative Buildings [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	838	789
Other [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,464	1,423
Construction in Progress [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 730	$ 1,173