Intangible assets (Details 2) - BRL (R$) R$ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Alto Tiete [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Intangible assets | R$ 202,823 | R$ 219,096 |
| Sao Lourenco [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Intangible assets | R$ 2,216,444 | R$ 2,386,192 |