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Biological assets - Roll-forward of biological assets (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of reconciliation of changes in biological assets [line items] |  |  |
Opening Balance | R$ 18,278,582 | R$ 14,632,186 |
Additions | 7,180,450 | 5,777,952 |
Additions of merged companies (1) | 366,785 |  |
Depletions | (4,831,916) | (3,680,997) |
Transfers | 102,790 | (136,297) |
Gain on fair value adjustments | (1,431,530) | (1,989,831) | R$ (1,199,759)
Disposals | (130,922) | (128,370) |
Write-offs | (114,298) | (175,723) |
Closing Balance | R$ 22,283,001 | R$ 18,278,582 | R$ 14,632,186
Effective Area For Forest From The Year Of Planting | 3 years |  |
Bottom of range [member] |  |  |
Disclosure of reconciliation of changes in biological assets [line items] |  |  |
Average Cycle for Formation of Forests, Biological Assets | 6 years |  |
Top of range [member] |  |  |
Disclosure of reconciliation of changes in biological assets [line items] |  |  |
Average Cycle for Formation of Forests, Biological Assets | 7 years |  |

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- Definition The amount of additions to biological assets resulting from purchases. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of additions to biological assets, other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Biological assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease in biological assets due to the detachment of produce from the assets or the cessation of the assets' life processes. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The decrease in biological assets resulting from disposals. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The gains (losses) arising from changes in fair value less costs to sell of biological assets due to both physical and price changes in the market. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in biological assets resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50_g&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of non-current biological assets. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The period of harvest cycle with productivity and area of plantation for determining the fair value of biological assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition Period for effective area for forest from the year of planting for determining the fair value of biological assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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