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LEASES - Lease liabilities (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Present value of liabilities	R$ 6,972,915	R$ 6,243,782	R$ 6,182,530
Lands and farms
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Average rate - % p.a. (1)	12.27%
Maturity (2)	October/2052
Present value of liabilities	R$ 3,951,880
Machinery and equipment
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Average rate - % p.a. (1)	11.19%
Maturity (2)	April/2035
Present value of liabilities	R$ 273,019
Buildings
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Average rate - % p.a. (1)	10.75%
Maturity (2)	May/2031
Present value of liabilities	R$ 117,387
Ships and boats
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Average rate - % p.a. (1)	11.25%
Maturity (2)	February/2039
Present value of liabilities	R$ 2,626,083
Vehicles
Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]
Average rate - % p.a. (1)	11.10%
Maturity (2)	November/2028
Present value of liabilities	R$ 4,546

X

- 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 2024-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

The weighted average lessee's incremental borrowing rate applied to lease liabilities recognised in the statement of financial position at the date of initial application of IFRS 16. The incremental borrowing rate is the rate of interest that a lessee would have to pay to borrow over a similar term, and with a similar security, the funds necessary to obtain an asset of a similar value to the right-of-use asset in a similar economic environment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph C12
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_C12_a&doctype=Appendix&subtype=C
-URIDate 2024-03-27

+ Details

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

X

- Definition

Lessee, Operating Leases, Present Value Of Lease Liabilities [Line Items]

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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X

- Definition

Maturity period of lease liabilities

+ References

No definition available.

+ Details

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Namespace Prefix:	suz_
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X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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X

- Details

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X

- Details

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- Details

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