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INVESTMENTS - Investments in associates and joint ventures (Details) - BRL (R$) R$ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Investments
Company Participation in equity	R$ 132,625	R$ 140,934
Company Participation in the income of the period	(2,952)	5,569
Associates
Investments
Company Participation in equity	86,997	108,406
Company Participation in the income of the period	R$ (16,052)	(541)
Ensyn Corporation
Investments
Participation equity in associate (as a percent)	25.30%
Company Participation in equity	R$ 2,995	21,437
Company Participation in the income of the period	R$ (13,086)
Spinnova Oy
Investments
Participation equity in associate (as a percent)	24.06%
Company Participation in equity	R$ 84,002	86,969
Company Participation in the income of the period	(2,966)	(541)
Joint ventures
Investments
Company Participation in equity	45,628	32,528
Company Participation in the income of the period	13,100	6,110
Ibema Companhia Brasileira de Papel
Investments
Company Participation in equity	40,139	28,487
Company Participation in the income of the period	11,651	6,175
F&E Technologies LLC
Investments
Company Participation in equity	5,489	4,041
Company Participation in the income of the period	R$ 1,449	R$ (65)

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- 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.

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No definition available.

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- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The Company's total profit (loss) from investments in associates and joint ventures accounted for using the equity method

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