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Trade receivables (Details 4) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Judicial bonds R$ 2,967,308 R$ 3,085,265
Municipality Of Sao Paulo [Member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds 2,898,210 3,042,927
Municpalityof Cotia [Member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds 15,456
Municipality Of Ferrazde Vasconcelos [Member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds 22,883
Municpalityof Cachoeira Paulista [Member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds 12,608 14,964
Municipality Of Agudos [Member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds 14,039
Other [member]    
IfrsStatementLineItems [Line Items]    
Judicial bonds R$ 19,568 R$ 11,918