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Suppliers - Schedule of Suppliers (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Suppliers  R$ 2,952 R$ 3,017
Energy Purchased For Resale [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  1,176 1,250
Energy On Spot Market [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  199 135
Charges Energy Network [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  240 246
Itaipu Binacional [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  210 240
Gas Purchased For Resale [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  216 204
Materials And Services [Member]    
IfrsStatementLineItems [Line Items]    
Suppliers  R$ 911 R$ 942