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Trade receivables (Details 4) - BRL (R$) R$ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | R$ 3,232,377 | R$ 3,085,265
Municipality Of Sao Paulo [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | 3,139,801 | 3,042,927
Sao Paulo State Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | 41,359 |
Municipality Of Cachoeira Paulista [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | 15,871 | 15,456
Municipality Of Agudos [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | 13,061 | 14,964
Other [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Registered warrants current | R$ 22,285 | R$ 11,918

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