Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 44,294	$ 42,473
Accumulated depreciation	(15,030)	(13,625)
Property, plant, and equipment, net	29,264	28,848
Property, Plant, and Equipment (Textual)
Depreciation expense	1,500	1,400	$ 1,300
Land [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	476	416
Crude Oil Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	32,047	30,721
Transportation and Terminaling Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	5,179	4,935
Grain Processing Equipment [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,201	1,212
Administrative Buildings [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,015	953
Finance lease ROU assets [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	944
Accumulated depreciation	(155)
Finance lease ROU assets [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost		711
Accumulated depreciation		(106)
Other [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,701	1,565
Construction in Progress [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	$ 1,731	$ 1,960