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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Notes and other explanatory information [abstract]    
Crude oil $ 3,218 $ 3,738
Oil products 2,893 3,278
Intermediate products 561 587
Natural gas and Liquefied Natural Gas (LNG) 126 135
Biofuels 13 14
Fertilizers 1 4
Total products 6,812 7,756
Materials, supplies and others 1,331 1,023
Total $ 8,143 $ 8,779