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COST OF SALES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Notes and other explanatory information [abstract]      
Inventories at the beginning of the year $ 173 $ 155 $ 116
Plus: Charges of the year      
Purchases of inventories, energy and gas  411 502 433
Salaries and social security charges 85 79 59
Employees benefits 17 15 13
Defined benefit plans 8 5 4
Works contracts, fees and compensation for services 111 97 73
Property, plant and equipment depreciation 254 202 194
Intangible assets amortization 5 1 1
Right-of-use assets amortization 1 3 5
Energy transportation 9 8 6
Transportation and freights 20 16 13
Consumption of materials 27 30 26
Penalties 2 1 2
Maintenance 47 61 52
Canons and royalties 92 89 65
Environmental control 4 5 4
Rental and insurance 31 31 27
Surveillance and security 5 4 3
Taxes, rates and contributions 7 5 4
Other 3 3 6
Total charges of the year 1,139 1,157 990
Less: Inventories at the end of the year (205) (173) (155)
Total cost of sales $ 1,107 $ 1,139 $ 951