Employee benefits plans - Disclosure of contributions by the company (Details) - Suzano Prev - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Employer Contributions [Line Items]
Defined Contribution Plan, Employee Contributions, Maximum Percentage of Salary	12.00%
Employer contributions	R$ 24,287	R$ 21,719
Nominal salary greater than 10 URS
Employer Contributions [Line Items]
Defined Contribution Plan, Annual Contributions Per Employee, Percent	0.50%
Nominal salary greater than 10 URS \| Bottom of range [member]
Employer Contributions [Line Items]
Defined Contribution Plan, Annual Contributions Per Employee, Percent	1.00%
Nominal salary greater than 10 URS \| Top of range
Employer Contributions [Line Items]
Defined Contribution Plan, Annual Contributions Per Employee, Percent	6.00%
Nominal salary less than 10 URS \| Bottom of range [member]
Employer Contributions [Line Items]
Defined Contribution Plan, Annual Contributions Per Employee, Percent	0.50%
Defined Contribution Plan, Annual Contributions by the Company Per Employee, Percent	0.50%
Nominal salary less than 10 URS \| Top of range
Employer Contributions [Line Items]
Defined Contribution Plan, Annual Contributions Per Employee, Percent	1.00%

The amount of employer contributions to retirement benefit plans.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2025-01-01
-Paragraph 35
-Subparagraph b
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2025-en-r&anchor=para_35_b_i&doctype=Standard
-URIDate 2025-03-27

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- Definition

Percentage of employee gross pay the Company contributes to a defined contribution plan per employee.

+ References

No definition available.

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- Definition

Percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

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- Definition

The maximum percentage of salary an employee may choose to invest in the pension plan.

+ References

No definition available.

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- Definition

Employer Contributions [Line Items]

+ References

No definition available.

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