Trade accounts payable - Long-term Commitments (Details) - BRL (R$) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Sep. 15, 2025 |
|
| Trade accounts payable [Line Items] | |||
| LongTermTake Or Pay Contracts | R$ 25,236,794,000 | R$ 26,239,939,000 | |
| Exchange Agreement For Biological Assets | Pangeia Project [Member] | |||
| Trade accounts payable [Line Items] | |||
| Payments Made Amount | R$ 878,049 | ||
| Payments Due Amount | 1,962,554 | ||
| Exchange Agreement For Biological Assets | Pangeia Project [Member] | 2026 | |||
| Trade accounts payable [Line Items] | |||
| Payments Due Amount | 819,970 | ||
| Exchange Agreement For Biological Assets | Pangeia Project [Member] | 2028 | |||
| Trade accounts payable [Line Items] | |||
| Payments Due Amount | R$ 1,142,584 | ||