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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Schedule of Inventories    
Refinery feedstocks $ 2,036 $ 2,223
Refined petroleum products and blendstocks 4,307 3,790
Renewable diesel feedstocks and products 1,024 913
Ethanol feedstocks and products 307 313
Materials and supplies 354 344
Inventories $ 8,028 $ 7,583