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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Contract with Customer, Liability, Revenue Recognized     $ (405) $ (315)    
Increase (Decrease) in Accounts Receivable     (2,084) 340    
Contract with Customer, Liability $ 385 $ 379 385 379 $ 377 $ 394
Sunoco LP [Member]            
Contract with Customer, Asset, after Allowance for Credit Loss 128   128   117  
Capitalized Contract Cost, Amortization 5 $ 4 10 $ 8    
Receivables from Customers $ 263   $ 263   $ 366