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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Details 6) - BRL (R$)
R$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Net liabilities exposed R$ (4,249) R$ (5,954)
Base scenario [member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (4,249)  
Net liabilities exposed (4,249)  
Probable Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (4,152)  
Net liabilities exposed (4,152)  
Net effect of exchange rate fluctuation 97  
Adverse Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (4,886)  
Net liabilities exposed (4,886)  
Net effect of exchange rate fluctuation (637)  
Loans and financings [member] | Base scenario [member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (3,975)  
Loans and financings [member] | Probable Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (3,885)  
Loans and financings [member] | Adverse Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (4,571)  
Suppliers (itaipu binacional) [member] | Base scenario [member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (274)  
Suppliers (itaipu binacional) [member] | Probable Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed (267)  
Suppliers (itaipu binacional) [member] | Adverse Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Net liabilities exposed R$ (315)