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INTANGIBLE - Goodwill and intangible assets with indefinite useful life (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 03, 2019	Mar. 31, 2018
Goodwill and intangible assets with indefinite useful life
Goodwill and intangible assets with indefinite useful life	R$ 8,017,579	R$ 8,063,014
Vale Florestar S.A.
Goodwill and intangible assets with indefinite useful life
Goodwill and intangible assets with indefinite useful life		45,435
Goodwill impairment	45,435
Facepa
Goodwill and intangible assets with indefinite useful life
Goodwill and intangible assets with indefinite useful life	119,332	119,332
Total consideration transferred / to be transferred				R$ 307,876
Fibria
Goodwill and intangible assets with indefinite useful life
Goodwill and intangible assets with indefinite useful life	7,897,051	7,897,051
Total consideration transferred / to be transferred			R$ 37,235,854
Other
Goodwill and intangible assets with indefinite useful life
Goodwill and intangible assets with indefinite useful life	R$ 1,196	R$ 1,196

X

- Definition

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2020-01-01
-Paragraph B64
-Subparagraph f
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-URIDate 2020-01-01

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X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2020-01-01
-Paragraph B67
-Subparagraph d
-Clause v
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B
-URIDate 2020-01-01

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X

- Definition

The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
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-URIDate 2020-01-01

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