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Provision for judicial liabilities - Possible losses - Labor (Details) - BRL (R$) R$ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Labor |  |
Disclosure of other provisions [line items] |  |
Possible Losses for Which No Provision Was Recorded | R$ 175,800 | R$ 171,480

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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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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of possible losses for which no provision for loss was recorded. + References No definition available. + Details
Name: | suz_PossibleLossesForWhichNoProvisionWasRecorded
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=suz_LaborMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |