Marketable securities (Details) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | R$ 2,300,655 | R$ 2,449,682 |
| Current portion | (2,274,316) | (2,434,441) |
| Non-current portion | 26,339 | 15,241 |
| FUNCINE [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | 26,339 | 15,241 |
| Fundo Soberano [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | 1,518 | 2,404 |
| FIC Government Bonds [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | 1,609,536 | 1,716,706 |
| FICCDB [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | 3,583 | 18,897 |
| FIC Financial Bills [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | 343,824 | 394,343 |
| FIC Other [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Marketable securities | R$ 315,855 | R$ 302,091 |