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COMMITMENTS (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of take-or-pay contracts
                       
    Payments in the period            
Type of service   2023   2024   2025   2026   After 2026   Total
                         
Transportation of iron ore, coal, coke, steel products, cement and mining products.   2,068,319   2,196,306   1,980,843   1,571,822   2,075,188   9,892,478
Supply of power, natural gas, oxygen, nitrogen, argon and iron ore pellets.   583,152   567,043   558,396   456,737   842,653   3,007,981
Processing of slag generated during pig iron and steel production.   22,981   21,259   1,768           46,008
Oil Storage and Handling   2,754   3,576   2,716   2,607   7,822   19,475
Labor and consultancy services   31,391   26,257   30,962   30,962   123,846   243,418
    2,708,597   2,814,441   2,574,685   2,062,128   3,049,509   13,209,360