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Acquisitions - Acquisition of Terminal and Retail Locations in Buffalo, New York (Details)
$ in Millions
Jul. 12, 2019
USD ($)
Store
bbl
Sep. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]      
Goodwill   $ 21,277 $ 20,184
NOCO      
Business Acquisition [Line Items]      
Barrels handled | bbl 900,000    
Number of stores | Store 33    
Cash consideration $ 135    
Property, plant and equipment, net 38    
Inventories 3    
Goodwill $ 94