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INVENTORIES - Roll-forward of estimated losses (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Roll-forward of estimated losses
Raw materials, additional estimated losses	R$ 43,166	R$ 38,136
Spare parts, additional estimated losses	24,502	21,184
Raw materials, write-off of inventory	35,715	47,231
Spare parts, write-off of inventory	5,371	9,529
Inventories pledged as collateral	0	0
Inventories
Roll-forward of estimated losses
Opening balance	(91,258)	(79,885)
Additions	(89,552)	(85,110)
Reversals	33,492	11,536
Write-offs	41,329	62,201
Closing balance	R$ (105,989)	R$ (91,258)

X

- Definition

The amount of additional allowance for credit losses of financial assets recognised in profit or loss. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

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

X

- Definition

The amount of inventories pledged as security for liabilities. [Refer: Inventories]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 2
-IssueDate 2022-03-24
-Paragraph 36
-Subparagraph h
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2022-en-r&anchor=para_36_h&doctype=Standard
-URIDate 2022-03-24

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

X

- References

No definition available.

+ Details

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X

- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the reversal of impairment. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

X

- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the utilisation of the allowance. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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

X

- Definition

The amount of estimated loss of inventory classified as raw materials.

+ References

No definition available.

+ Details

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Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of estimated loss of inventory classified as spare parts.

+ References

No definition available.

+ Details

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Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

X

- Definition

The amount of inventory classified as raw materials written off during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The amount of inventory classified as spare parts written off during the reporting period.

+ References

No definition available.

+ Details

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- Details

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