Provision for judicial liabilities - Contingencies with possible losses (Details) - BRL (R$) R$ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fibria | ||
| Disclosure of other provisions [line items] | ||
| Fair value adjustment of probable contingencies | R$ 2,050,641 | R$ 2,076,296 |
| Total | ||
| Disclosure of other provisions [line items] | ||
| Possible losses for which no provision was recorded | 11,737,561 | 11,630,929 |
| Tax and social security | ||
| Disclosure of other provisions [line items] | ||
| Possible losses for which no provision was recorded | 10,475,914 | 10,417,734 |
| Labor | ||
| Disclosure of other provisions [line items] | ||
| Possible losses for which no provision was recorded | 187,362 | 189,506 |
| Civil and environmental | ||
| Disclosure of other provisions [line items] | ||
| Possible losses for which no provision was recorded | R$ 1,074,285 | R$ 1,023,689 |