Recoverable taxes - Roll-forward of provision for loss (Details) - BRL (R$) R$ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Recoverable Taxes [Abstract] | ||
| Opening balance | R$ 1,581,961 | R$ 1,581,961 |
| Addition | (316,741) | (374,166) |
| Reversal | 186,014 | 181,014 |
| Write-off | R$ 1,201 | |
| Closing balance | R$ 1,775,113 |