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General information about financial statements (Details) - item | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2025
State of Sao Paulo | Suzano Industrial |  |  |
Company's Operations [Line Items] |  |  |
Number of Industrial Units |  |  | 2
Number of Industrial Units |  |  | 16
Number of Technology Centers |  |  | 6,000
% | 100.00% | 100.00% |
Controlling Shareholders |  |  |
Company's Operations [Line Items] |  |  |
% | 49.28% | 49.25% |

X
- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph 19B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2024-03-27 + Details
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