Accounting practices adopted (Details) R$ in Thousands	12 Months Ended
Dec. 31, 2018 item	Jan. 01, 2019 BRL (R$)
Biological assets
Duration of training cycle	7 years
Operating Leases
New standards, revisions and interpretation not yet in force
Number of forest cycles of eucalyptus \| item	3
Total duration of all forest cycles of eucalyptus	21 years
Asset		R$ 1,112,615
Present value of liabilities		1,112,615
Operating Leases \| Land and farms
New standards, revisions and interpretation not yet in force
Asset		990,928
Present value of liabilities		R$ 990,928
Discount rate		5.78%
Operating Leases \| Property
New standards, revisions and interpretation not yet in force
Asset		R$ 18,452
Present value of liabilities		R$ 18,452
Discount rate		5.78%
Operating Leases \| Machine and Equipment
New standards, revisions and interpretation not yet in force
Asset		R$ 103,325
Present value of liabilities		R$ 103,235
Discount rate		5.13%

No definition available.

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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
-Note Effective 2019-01-01
-Name IFRS
-Number 16
-IssueDate 2018-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2018-03-16

+ Details

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- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2019-01-01
-Name IFRS
-Number 16
-IssueDate 2018-01-01
-Paragraph 53
-Subparagraph j
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_53_j&doctype=Standard
-URIDate 2018-03-16

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- References

No definition available.

+ Details

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- Definition

The discount rate for leases.

+ References

No definition available.

+ Details

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- Definition

The total duration of all forest cycles of eucalyptus, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

+ References

No definition available.

+ Details

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- Definition

The period of harvest cycle with productivity and area of plantation for determining the fair value of biological assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

+ References

No definition available.

+ Details

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- Definition

The number of forest cycles of eucalyptus.

+ References

No definition available.

+ Details

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- Details

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