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FINANCIAL INVESTMENTS (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Current R$ 911,378 R$ 1,533,004
Non-current 169,977 251,299
Investment [Member]    
IfrsStatementLineItems [Line Items]    
Current 50,787 39,800
Non-current 27,554 139,949
Usiminas Shares [Member]    
IfrsStatementLineItems [Line Items]    
Current 860,591 1,493,204
Bond [Member]    
IfrsStatementLineItems [Line Items]    
Non-current R$ 142,423 R$ 111,350