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BASIS OF CONSOLIDATION AND INVESTMENTS (Details 2) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies R$ 431,562 R$ 267,498
Other adjustments cost of sales (110,734) (80,006)
Other adjustments to taxes 30,421 27,202
Other adjustments others (118) 23,223
Equity in results 351,131 237,917
M R S Logistica S A [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies 449,462 325,800
Transnordestina [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies (23,568) (29,307)
Arvedi Metalferdo Brasils [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies (1,332) 4,702
Equimac S A [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies 5,311 3,936
Indirect Interest In Affiliates C E E E G [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies 50,757  
Fair Value Amortizated [Member]    
IfrsStatementLineItems [Line Items]    
Equity in results of affiliated companies R$ (49,068) R$ (37,633)