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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Schedule of Inventories    
Refinery feedstocks $ 2,366 $ 2,223
Refined petroleum products and blendstocks 3,847 3,790
Renewable diesel feedstocks and products 1,051 913
Ethanol feedstocks and products 300 313
Materials and supplies 348 344
Inventories $ 7,912 $ 7,583