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Trade accounts receivables - Main customers (Details) - Net Sales | Jun. 30, 2025 | Dec. 31, 2024
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Pulp |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Concentration Risk, Percentage | 10.86% | 10.00%
Paper |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Concentration Risk, Percentage | 12.79% |

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