Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 42,473	$ 40,010
Accumulated depreciation	(13,625)	(12,530)
Property, plant, and equipment, net	28,848	27,480
Property, Plant, and Equipment (Textual)
Property, plant, and equipment, assets under capital leases	711	635
Accumulated amortization on assets under capital leases	106	72
Depreciation expense related to continuing operations	1,400	1,300	$ 1,300
Land [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	416	411
Crude Oil Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	30,721	30,109
Transportation and Terminaling Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	4,935	4,335
Grain Processing Equipment [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,212	903
Administrative Buildings [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	953	910
Other [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	2,276	2,068
Construction in Progress [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 1,960	$ 1,274