Goodwill based on expected future profitability - Segment information (Details) - BRL (R$) R$ in Thousands |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Total | ||
| Disclosure of operating segments [line items] | ||
| Goodwill Based On Expected Future Profitability | R$ 8,187,242 | R$ 8,187,242 |
| Pulp | ||
| Disclosure of operating segments [line items] | ||
| Goodwill Based On Expected Future Profitability | 7,897,051 | 7,897,051 |
| Paper | ||
| Disclosure of operating segments [line items] | ||
| Goodwill Based On Expected Future Profitability | R$ 290,191 | R$ 290,191 |