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Reporting Segments (Additions To Property Plant And Equipment Including Acquisitions Net Of Contributions In Aid Of Construction Costs Segments) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions $ 6,006 $ 5,929 $ 8,223
Investment In ETP [Member]      
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions 5,901 5,810 8,167
Investment In Sunoco LP [Member]      
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions 103 119 178
Investment in Lake Charles LNG [Member]      
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions 2 0 1
Adjustments and Eliminations [Member]      
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions $ 0 $ 0 $ (123)