Recoverable taxes - Roll-forward of provision for loss (Details) - BRL (R$) R$ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Jun. 30, 2025 |
|
| Recoverable Taxes [Abstract] | ||
| Opening Balance | R$ 1,775,113 | R$ 1,581,961 |
| Increase in Provision for Impairment of Value Added Tax on Sales and Services Credits | (46,989) | (374,166) |
| Decrease In Provision For Impairment Of Value Added Tax On Sales And Services Credits Due To Recovery Of Credits | 60,200 | R$ 181,014 |
| Closing Balance | R$ 1,761,902 |