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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, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions [1] $ 5,268 $ 5,630 $ 6,006
Investment In Sunoco LP [Member]      
Segment Reporting Information [Line Items]      
Property, Plant and Equipment, Additions [1] $ 148 $ 103 $ 103
[1]
Excluding acquisitions, net of contributions in aid of construction costs (capital expenditures related to the Partnership’s proportionate ownership on an accrual basis).