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Risk Management (Details 11) - BRL (R$) R$ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Financial investments | R$ 3,699,694 | R$ 2,426,752
Restricted cash | 37,715 | 54,944
Trade receivables | 5,470,564 | 5,233,932
Instrumentos financeiros derivativos | 67,440 |
Water and Basic Sanitation National Agency ANA | 1,993 | 2,673
Financial asset (indemnity) | 17,601,626 |
Carrying amount [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash and cash equivalents | 1,682,606 | 838,484
Financial investments | 4,468,751 | 2,426,752
Restricted cash | 37,715 | 54,944
Trade receivables | 4,222,355 | 3,856,723
Instrumentos financeiros derivativos | 67,440 |
Water and Basic Sanitation National Agency ANA | 1,993 | 2,673
Financial asset (indemnity) | 17,601,626 |
Other assets | 230,900 | 196,065
Fair Values [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash and cash equivalents | 1,682,606 | 838,484
Financial investments | 4,468,751 | 2,426,752
Restricted cash | 37,715 | 54,944
Trade receivables | 4,222,355 | 3,856,723
Instrumentos financeiros derivativos | 67,440 |
Water and Basic Sanitation National Agency ANA | 1,993 | 2,673
Financial asset (indemnity) | 17,601,626 |
Other assets | R$ 230,900 | R$ 196,065

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