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v3.25.3

LEASES - Changes in lease liabilities (Details) - BRL (R$) R$ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Lessee, Operating Leases, Changes in Lease Libilities [Line Items] |  |
Opening Balance | R$ 6,972,915 | R$ 6,243,782
Additions | 767,736 | 744,226
Write-offs (2) | (605) | (3,102)
Payments | (1,059,908) | (1,325,398)
Accrual of financial charges (1) | 547,497 | 700,283
Exchange rate variations | (381,893) | 613,124
Closing Balance | 6,845,742 | 6,972,915
Current | 846,668 | 872,228
Non-current | 5,999,074 | 6,100,687
Leased Land | Biological assets [domain] |  |
Lessee, Operating Leases, Changes in Lease Libilities [Line Items] |  |
Operating Leases, Capitalized Interest | R$ 200,177 | R$ 223,055

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- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_47_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_CurrentLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_47_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of non-current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_47_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_NoncurrentLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of capitalized interest expense. + References No definition available. + Details
Name: | suz_LeaseLiabilitiesAccrualOfFinancialCharges
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of additional lease liabilities. + References No definition available. + Details
Name: | suz_LeaseLiabilitiesAddition
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of adjustment due to exchange rate variations relating to lease liabilities. + References No definition available. + Details
Name: | suz_LeaseLiabilitiesExchangeRateVariation
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of payment relating to lease liabilities. + References No definition available. + Details
Name: | suz_LeaseLiabilitiesPayments
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The decrease in lease liabilities due to write-offs. + References No definition available. + Details
Name: | suz_LeaseLiabilitiesWriteOffs
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Lessee, Operating Leases, Changes in Lease Libilities [Line Items] + References No definition available. + Details
Name: | suz_LesseeOperatingLeasesChangesInLeaseLibilitiesLineItems
Namespace Prefix: | suz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of interest expense capitalized during the reporting period. + References No definition available. + Details
Name: | suz_OperatingLeasesCapitalizedInterest
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |