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FINANCIAL INVESTMENTS (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Current R$ 1,533,004 R$ 1,456,485
NonCurrent 251,299 156,185
Investment [Member]    
IfrsStatementLineItems [Line Items]    
Current 39,800 271,590
NonCurrent 139,949 15,675
Usiminas Shares [Member]    
IfrsStatementLineItems [Line Items]    
Current 1,493,204 1,184,895
Bond [Member]    
IfrsStatementLineItems [Line Items]    
NonCurrent R$ 111,350 R$ 140,510