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FINANCIAL INSTRUMENTS (Details 14) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Assets, current R$ 169,977 R$ 251,299
Assets, total 152,967 32,211
Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net (730,656) 69,250
Liabilities current 458,765  
Total 458,765  
Assets, current 152,967  
Assets, total 152,967  
Iron Ore Derivative [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net 19,446  
Exchange Rate Swap Dollar Euro [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net   9,567
Exchange rate swap CDI x Dollar [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net (146,528) 43,591
Liabilities current 157,857  
Total 157,857  
Exchange Rate Swap C D I I P C A [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net (791,938) 112,694
Liabilities current 300,908  
Total 300,908  
Exchange Dollar Real Swap [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Financial income (expenses), net 188,364 R$ (96,602)
Assets, current 152,967  
Assets, total R$ 152,967