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Inventories (Tables)
 6 Months Ended
Jun. 30, 2023
Notes and other explanatory information [abstract]  
Schedule of inventories
   
  06.30.2023 12.31.2022
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