Investments (Details Narrative) - BRL (R$) R$ in Thousands |
May 28, 2025 |
Dec. 31, 2025 |
Nov. 03, 2025 |
Oct. 29, 2025 |
Oct. 15, 2025 |
Aug. 19, 2025 |
Jul. 17, 2025 |
May 08, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|---|---|---|---|---|
| IfrsStatementLineItems [Line Items] | |||||||||
| Capital stock | R$ 21,210,000 | R$ 15,000,000 | |||||||
| S A B E S P [Member] | |||||||||
| IfrsStatementLineItems [Line Items] | |||||||||
| Capital stock | R$ 85,000 | R$ 1 | |||||||
| Capital stock, shares | 85,000,000 | ||||||||
| S A B E S P Lux [Member] | |||||||||
| IfrsStatementLineItems [Line Items] | |||||||||
| Capital stock | R$ 2,000 | R$ 1,000 | R$ 100 | ||||||
| Aguas De Andradina [Member] | Igua Saneamento S A [Member] | |||||||||
| IfrsStatementLineItems [Line Items] | |||||||||
| Percentage of equity interest | 70.00% | ||||||||
| Aguas De Castilho [Member] | Igua Saneamento S A [Member] | |||||||||
| IfrsStatementLineItems [Line Items] | |||||||||
| Percentage of equity interest | 70.00% | ||||||||
| Concessionaria S A B E S P U R A E 1 S A [Member] | |||||||||
| IfrsStatementLineItems [Line Items] | |||||||||
| Capital stock | R$ 1 |