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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Related Party Transactions [Abstract]        
Sales to related parties [1] $ 186 $ 201 $ 558 $ 572
Purchases from related parties [2] $ 184 $ 149 $ 571 $ 428
[1]
Sales to related parties, which are included in sales and other operating revenues, consist primarily of sales of refined products to PFJ Southeast, an equity affiliate which owns and operates travel plazas primarily in the Southeast region of the United States.
[2] We obtain utilities, transportation services and purchase ethanol from certain of our equity affiliates.