Inventories - Roll-forward of estimated losses (Details) - BRL (R$) R$ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2025 |
Dec. 31, 2024 |
|
| Inventories [Line Items] | ||
| Opening Balance | R$ 97,934 | R$ 95,053 |
| Additional allowance recognised in profit or loss, allowance account for credit losses | 30,683 | 83,705 |
| Reversal Allowance Account For Credit Losses Financial Assets | 6,652 | 6,352 |
| Utilisation Allowance Account For Credit Losses Financial Assets | 17,756 | 74,472 |
| Closing Balance | R$ 104,209 | R$ 97,934 |