Provision for judicial liabilities - Contingencies with possible losses (Details) - BRL (R$) R$ in Thousands |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fibria | ||
| Disclosure of other provisions [line items] | ||
| Fair Value Adjustment Of Probable Contingencies | R$ 2,088,587 | R$ 2,108,635 |
| Total | ||
| Disclosure of other provisions [line items] | ||
| Possible Losses for Which No Provision Was Recorded | 11,545,442 | 15,074,276 |
| Taxes and social security (1) | ||
| Disclosure of other provisions [line items] | ||
| Possible Losses for Which No Provision Was Recorded | 10,329,685 | 9,837,082 |
| Labor | ||
| Disclosure of other provisions [line items] | ||
| Possible Losses for Which No Provision Was Recorded | 186,654 | 171,480 |
| Civil and environmental (1) (2) | ||
| Disclosure of other provisions [line items] | ||
| Possible Losses for Which No Provision Was Recorded | R$ 1,029,103 | R$ 5,065,714 |