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Estimates (Property, Plant and Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross $ 89,790   $ 79,776
Less - Accumulated depreciation (15,597)   (12,813)
Property, Plant and Equipment, Net 74,193 $ 66,962 66,963
Land and Land Improvements [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 1,264   1,168
Building and Building Improvements [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 2,632   2,664
Pipelines [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 64,678   58,783
Natural gas and NGL storage facilities (5 to 46 years)      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 5,898   4,978
Right Of Way [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 4,859   4,533
Property, Plant and Equipment, Other Types [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross 1,964   1,583
Construction Work-In-Process [Member]      
Property, Plant and Equipment, Net [Abstract]      
Property, plant and equipment, gross $ 8,495   $ 6,067