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Financial Instruments (Details 8) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Net R$ 13,984,091 R$ 10,338,902
Risk Of Power Purchase And Sale Transactions Price [member]    
IfrsStatementLineItems [Line Items]    
Current assets 379,261  
Current liabilities (321,646)  
Net Current 57,615  
Noncurrent assets 722,423  
Noncurrent liabilities (431,938)  
Net Noncurrent 290,485  
Net assets 1,101,684  
Net liabilities (753,584)  
Net R$ 348,100