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Inventories (Tables)
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Summary of Inventories
 
  
2020
 
 
2019
 
 
2018
 
Refined products
  
 
59,971
 
 
 
50,563
 
 
 
33,583
 
Crude oil and natural gas
  
 
33,066
 
 
 
24,756
 
 
 
14,571
 
Products in process
  
 
1,966
 
 
 
2,259
 
 
 
1,177
 
Raw materials, packaging materials and others
  
 
5,134
 
 
 
2,901
 
 
 
3,993
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
100,137 
(1)
 
 
 
80,479 
(1)
 
 
 
53,324 
(1)
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 

(1)
As of December 31, 2020, 2019 and 2018, the cost of inventories does not exceed their net realizable value.