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FINANCIAL INSTRUMENTS (Details 15) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Liabilities current R$ 251,299 R$ 156,185  
Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net 69,250 (48,556) R$ (439)
Liabilities current 32,211    
Total 32,211    
Liabilities current (936,027)    
Total (758,438)    
Liabilities non-current 177,589    
Exchange Rate Swap Dollar Real Settled [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net   176,991 37,322
Iron Ore Derivative [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Liabilities current 10,521    
Total 10,521    
Liabilities current (936,027)    
Total (936,027)    
Exchange Rate Swap Dollar Euro [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net 9,567   7,119
Liabilities current 9,567    
Total 9,567    
Exchange rate swap CDI x Dollar [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net 43,591 43,817 (9,960)
Liabilities current 12,123    
Total 12,123    
Exchange Rate Swap C D I I P C A [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net 112,694 (257,897) R$ (34,920)
Total 238,057    
Liabilities non-current 238,057    
Exchange Rate Swap Dollar Real [Member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Financial income (expenses), net (96,602) R$ (11,467)  
Total (60,468)    
Liabilities non-current R$ (60,468)