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11. Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventories Abstract  
Schedule of inventories
  06.30.2020 12.31.2019
Crude oil 2,062 3,905
Oil products 1,624 2,274
Intermediate products 372 586
Natural gas and Liquefied Natural Gas (LNG) 68 173
Biofuels 20 28
Fertilizers 28 28
Total products 4,174 6,994
Materials, supplies and others 865 1,195
Total 5,039 8,189