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Employees benefits (Details 5) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Liabilities R$ 540,821 R$ 521,312
Current liabilities 86,423 64,367
Non-current liabilities 454,398 456,945
Medical Plan [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities 66,245 119,729
F G T S Penalty [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities 70,535 60,657
Award For Length Of Service [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities 125,991 112,225
Others [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities R$ 278,050 R$ 228,701