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Estimates (Property, Plant and Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross $ 94,115 $ 89,790
Less - Accumulated depreciation (19,008) (15,597)
Property, Plant and Equipment, Net 75,107 74,193
Land and Land Improvements [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 1,233 1,232
Building and Building Improvements [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 4,236 2,664
Pipelines [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 69,120 64,678
Natural gas and NGL storage facilities (5 to 46 years)    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 6,393 5,898
Right Of Way [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 5,099 4,859
Property, Plant and Equipment, Other Types [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross 2,263 1,964
Construction Work-In-Process [Member]    
Property, Plant and Equipment, Net [Abstract]    
Property, plant and equipment, gross $ 5,771 $ 8,495