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Estimates (Property, Plant and Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross $ 103,991 $ 94,115
Less - Accumulated depreciation (22,384) (19,008)
Property, plant and equipment, net 81,607 75,107
Land and improvements    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 1,369 1,233
Buildings and improvements (1 to 45 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 4,598 4,236
Pipelines and equipment (5 to 83 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 77,112 69,120
Product storage and related facilities (2 to 83 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 7,410 6,393
Right of way (20 to 83 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 5,021 5,099
Other (1 to 48 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 2,816 2,263
Construction work-in-process    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross $ 5,665 $ 5,771