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Recoverable taxes - Roll-forward of provision for loss (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Recoverable Taxes [Abstract] |  |
Opening Balance | R$ 1,452,435 | R$ 1,103,807
Increase in Provision for Impairment of Value Added Tax on Sales and Services Credits | (316,741) | (399,838)
Decrease In Provision For Impairment Of Value Added Tax On Sales And Services Credits Due To Recovery Of Credits | 186,014 | 51,210
Provision For Impairment Of Value Added Tax On Sales And Services Credits, Write-Off | 1,201 |
Closing Balance | R$ 1,581,961 | R$ 1,452,435

X
- Definition The amount of reversal in provision for impairment of value added tax on sales and services credits recognized during the year due to recovery of credits. + References No definition available. + Details
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Namespace Prefix: | suz_
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Balance Type: | debit
Period Type: | duration

X
- Definition The amount of provision for impairment of value added tax on sales and services credits recognized during the year. + References No definition available. + Details
Name: | suz_IncreaseInProvisionForImpairmentOfValueAddedTaxOnSalesAndServicesCredits
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of provision for impairment of value added tax on sales and services credits. + References No definition available. + Details
Name: | suz_ProvisionForImpairmentOfValueAddedTaxOnSalesAndServicesCredits
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of provision for impairment of value added tax on sales and services credits written off during the year. + References No definition available. + Details
Name: | suz_ProvisionForImpairmentOfValueAddedTaxOnSalesAndServicesCreditsWriteOff
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Recoverable Taxes [Abstract] + References No definition available. + Details
Name: | suz_RecoverableTaxesAbstract
Namespace Prefix: | suz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration