Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 40,010	$ 37,733
Accumulated depreciation	(12,530)	(11,261)
Property, plant, and equipment, net	27,480	26,472
Property, Plant, and Equipment (Textual)
Property, plant, and equipment, assets under capital leases	635	118
Accumulated amortization on assets under capital leases	72	45
Depreciation expense related to continuing operations	1,300	1,300	$ 1,300
Land [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	411	400
Crude Oil Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	30,109	29,754
Transportation and Terminaling Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	4,335	3,692
Grain Processing Equipment [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	903	855
Administrative Buildings [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	910	838
Other [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	2,068	1,464
Construction in Progress [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 1,274	$ 730