The amount of outstanding funds that the entity is obligated to repay.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 12
-IssueDate 2025-01-01
-Paragraph 80
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_80_d&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 193
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_193_d&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 193
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_193_d&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

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

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Borrowings Maturity, Term

+ References

No definition available.

+ Details

Name:	suz_BorrowingsMaturityTerm
Namespace Prefix:	suz_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Series

+ References

No definition available.

+ Details

Name:	suz_NumberOfSeries
Namespace Prefix:	suz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=suz_IssuanceOfNewFinancingAfterTheReportingPeriodMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=suz_NonAdjustingEventsAfterReportingPeriodMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=suz_SeriesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=suz_SeriesTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=suz_DebenturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Events after the reporting period (Details) R$ in Thousands			1 Months Ended
Events after the reporting period (Details) R$ in Thousands	Apr. 02, 2026 BRL (R$)	Mar. 15, 2026	Apr. 30, 2026 BRL (R$)	Apr. 01, 2026 BRL (R$) series	Mar. 31, 2026 BRL (R$)	Dec. 31, 2025 BRL (R$)	Dec. 31, 2024 BRL (R$)
Disclosure of non-adjusting events after reporting period [line items]
Borrowings					R$ 90,735,617	R$ 94,801,257	R$ 101,435,531
Issuance Of New Financing After The Reporting Period
Disclosure of non-adjusting events after reporting period [line items]
Number of series \| series				2
Borrowings				R$ 2,500,000
Non-Adjusting Events After Reporting Period
Disclosure of non-adjusting events after reporting period [line items]
Deferred tax expense (income) relating to tax rate changes or imposition of new taxes			R$ 5,100,000
Series One \| Issuance Of New Financing After The Reporting Period
Disclosure of non-adjusting events after reporting period [line items]
Borrowings				1,500,000
Borrowings maturity, term		10 years
Borrowings, interest rate		7.0464%
SeriesTwo \| Issuance Of New Financing After The Reporting Period
Disclosure of non-adjusting events after reporting period [line items]
Borrowings				R$ 1,000,000
Borrowings maturity, term		12 years
Borrowings, interest rate		6.8338%
Debentures \| Issuance Of New Financing After The Reporting Period
Disclosure of non-adjusting events after reporting period [line items]
Borrowings maturity, term	15 years
Borrowings, interest rate	6.1759%
Notional amount	R$ 179,000