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TRADE ACCOUNTS RECEIVABLE - Rollforward of the expected credit losses (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Rollforward of the expected credit losses |  |
Beginning | R$ (95,053) | R$ (105,989)
Ending | (97,934) | (95,053)
Trade accounts receivable |  |
Rollforward of the expected credit losses |  |
Beginning | (31,962) | (21,109)
(Provisions)/Reversals, net | (2,585) | (35,202)
Utilisation Allowance Account For Credit Losses Financial Assetss | 5,790 | 24,230
Increase Decrease In Allowance Account For Credi tLosses Financial Assets | (1,543) | 119
Ending | R$ (30,300) | R$ (31,962)

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- References No definition available. + Details
Name: | ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element should be used to tag non-restated comparative information only. Allowance account for credit losses of financial assets at beginning of period. Allowance account for credit losses of financial assets at end of period + References No definition available. + Details
Name: | suz_AllowanceAccountForCreditLossesFinancialAssets
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Increase Decrease In Allowance Account For Credi tLosses Financial Assets + References No definition available. + Details
Name: | suz_IncreaseDecreaseInAllowanceAccountForCrediTLossesFinancialAssets
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition (Provisions)/Reversals, net + References No definition available. + Details
Name: | suz_ProvisionsReversalsNet
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Utilisation, allowance account for credit losses of financial assets. This element should be used to tag non-restated comparative information only. + References No definition available. + Details
Name: | suz_UtilisationAllowanceAccountForCreditLossesFinancialAssetss
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_TradeReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |