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v3.25.1

Summary of material information on accounting policies (Details Narrative) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Description of accrued income tax | The income tax was defined at a rate of 15%, plus a 10% surtax on taxable income exceeding R$ 240. |
Annual revenue calculated rate | 0.50% |
Programa De Formacao Do Patrimonio Do Servidor Publico [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Pasep rate | 1.65% |
Contribuicao Para O Financiamentoda Seguridade Social [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cofins rate | 7.60% |
Programa De Formacao Do Patrimonio Do Servidor Publico 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Pasep for financial revenues rate | 0.65% |
Contribuicao Para O Financiamentoda Seguridade Social 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cofins for financial revenues rate | 4.00% |
Sabesp Olympia S A [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Direct interest | 100.00% | 100.00%

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