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COST OF SALES (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of cost of sales
             
    12.31.2024   12.31.2023   12.31.2022
Inventories at the beginning of the year   205   173   155
             
Plus: Charges of the year            
Purchases of inventories, energy and gas    450   411   502
Salaries and social security charges   90   85   79
Employees benefits   19   17   15
Defined benefit plans   8   8   5
Works contracts, fees and compensation for services 128   111   97
Property, plant and equipment depreciation   328   254   202
Intangible assets amortization   4   5   1
Right-of-use assets amortization   2   1   3
Energy transportation   12   9   8
Transportation and freights   21   20   16
Consumption of materials   28   27   30
Penalties   1   2   1
Maintenance   61   47   61
Canons and royalties   97   92   89
Environmental control   6   4   5
Rental and insurance   27   31   31
Surveillance and security   6   5   4
Taxes, rates and contributions   6   7   5
Other   3   3   3
Total charges of the year   1,297   1,139   1,157
             
Less: Inventories at the end of the year   (223)   (205)   (173)
Total cost of sales   1,279   1,107   1,139