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CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Commitments: m-ac) (Details) m³ in Thousands, T in Millions, $ in Millions | 1 Months Ended | 12 Months Ended | 108 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2017 | Jun. 30, 2016 MW | Dec. 31, 2023 USD ($) m³ credit T | Dec. 31, 2006 distributor MW | Dec. 31, 2023 USD ($) m³ credit T | Feb. 13, 2019 USD ($) | Oct. 15, 2012
Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 139.7 |  |  |  |
24 Distributos (CCEAR) |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term contract for purchase of electric power, term |  |  |  | 15 years |  |  |
Number of distributors | distributor |  |  |  | 24 |  |  |
Long-term contract for purchase of electric power, electrical demand | MW |  |  |  | 200 |  |  |
Vale S.A. | Iron Ore, Pellets and Iron Ore Fines |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, total purchased volume | T |  |  | 8.0 |  |  |  |
Primetals Technologies Brazil Ltda. | Maintenance Services |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 21.3 |  |  |  |
Air Liquide Brasil Ltda., AirSteel Ltda., White Martins Gases Industriais Ltda., White Martins Steel Ltda. and ThyssenKrupp MinEnergy GmbH | Industrial Gas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 170.2 |  |  |  |
GE Global Parts and Products GMBH, General Electric International Inc. and Alstom Energia Térmica e Indústria Ltda. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, period for maintenance services of turbines | 20 years |  |  |  |  |  |
Long-term purchase commitment, extension period for maintenance services of turbines |  |  | 4 years |  |  |  |
GE Global Parts and Products GMBH, General Electric International Inc. and Alstom Energia Térmica e Indústria Ltda. | Turbine Maintenance |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 176.9 |  |  |  |
Companhia Distribuidora de Gás do Rio de Janeiro |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  | 85.00% |  |  |  |
Companhia Distribuidora de Gás do Rio de Janeiro | Natural Gas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 38.6 |  |  |  |
Long-term purchase commitment, renewal period |  |  | 2 years |  |  |  |
Long-term purchase commitment, volume | m³ |  |  | 61,300 |  |  |  |
LSI Logistica S.A. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 1.4 |  |  |  |
Unicarbo Ltda. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | 49.6 |  |  |  |
Cemig S.A. | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | 199.2 |  |  |  |
Cemig S.A. | Usiminas | Bottom of range |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term contract for purchase of electric power, electrical demand | MW |  | 32 |  |  |  |  |
Cemig S.A. | Usiminas | Top of range |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term contract for purchase of electric power, electrical demand | MW |  | 65.4 |  |  |  |  |
Engie S.A | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | 55.1 |  |  |  |
Enel S.A | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | 58.6 |  |  |  |
Canadian Solar S.A. | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | 149.5 |  |  |  |
Comgas S.A | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 53.8 |  |  |  |
Long-term contract for purchase of electric power, capacity | m³ |  |  | 240 |  | 240 |  |
Long-term contract for purchase of electric power, daily capacity deviation |  |  | 0.05 |  | 0.05 |  |
Long-term contract for purchase of electric power, take or pay volume |  |  | 0.80 |  | 0.80 |  |
Gasmig S.A. | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 197.9 |  |  |  |
Long-term contract for purchase of electric power, capacity | m³ |  |  | 850 |  | 850 |  |
Long-term contract for purchase of electric power, daily capacity deviation |  |  | 0.10 |  | 0.10 |  |
Long-term contract for purchase of electric power, take or pay volume |  |  | 0.80 |  | 0.80 |  |
MBL Materiais Básicos Ltda. | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  | $ 336.9 |  |  |  |
Long-term purchase commitment, term |  |  |  |  |  |  | 30 years
MBL Materiais Básicos Ltda. | Iron Ore | Usiminas |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Long-term purchase commitment, minimum volume | T |  |  |  |  | 3.6 |  |
Syndicated Loan | Techgen S.A. de C.V. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Original principal amount |  |  |  |  |  | $ 640.0 |
Borrowings outstanding |  |  | 49.6 |  | $ 49.6 |  |
Financial Guarantee | Syndicated Loan | Techgen S.A. de C.V. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Guarantor obligations, outstanding |  |  | $ 23.8 |  | $ 23.8 |  |
Financial Guarantee | Syndicated Loan | Techgen S.A. de C.V. |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |
Number of stand-by letters of credit | credit |  |  | 2 |  | 2 |  |
Guarantor obligations, percentage |  |  | 48.00% |  |  |  |

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