INTANGIBLE - Valuation assumptions (Details)	12 Months Ended
Dec. 31, 2021 R$ / $ $ / T
INTANGIBLE
Nominal rate (percentage)	3.14%
Discount rate, based on WACC (as a percent)	8.50%
2022
INTANGIBLE
Average exchange rate \| R$ / $	5.24
Discount rate (pos-tax)	8.50%
Discount rate (pre-tax)	11.90%
2023
INTANGIBLE
Average exchange rate \| R$ / $	5.10
Discount rate (pos-tax)	8.50%
Discount rate (pre-tax)	11.90%
2024
INTANGIBLE
Average exchange rate \| R$ / $	5.08
Discount rate (pos-tax)	8.50%
Discount rate (pre-tax)	11.90%
2025
INTANGIBLE
Average exchange rate \| R$ / $	5.43
Discount rate (pos-tax)	8.50%
Discount rate (pre-tax)	11.90%
2026
INTANGIBLE
Average exchange rate \| R$ / $	5.19
Discount rate (pos-tax)	8.50%
Discount rate (pre-tax)	11.90%
Asia \| 2022
INTANGIBLE
Net average pulp price	514.9
Asia \| 2023
INTANGIBLE
Net average pulp price	595.7
Asia \| 2024
INTANGIBLE
Net average pulp price	607.2
Asia \| 2025
INTANGIBLE
Net average pulp price	546.2
Asia \| 2026
INTANGIBLE
Net average pulp price	550.0
Europe \| 2022
INTANGIBLE
Net average pulp price	571.5
Europe \| 2023
INTANGIBLE
Net average pulp price	545.7
Europe \| 2024
INTANGIBLE
Net average pulp price	597.8
Europe \| 2025
INTANGIBLE
Net average pulp price	535.2
Europe \| 2026
INTANGIBLE
Net average pulp price	550.0
North America \| 2022
INTANGIBLE
Net average pulp price	613.4
North America \| 2023
INTANGIBLE
Net average pulp price	592.6
North America \| 2024
INTANGIBLE
Net average pulp price	649.2
North America \| 2025
INTANGIBLE
Net average pulp price	581.2
North America \| 2026
INTANGIBLE
Net average pulp price	597.3
Latin America \| 2022
INTANGIBLE
Net average pulp price	609.5
Latin America \| 2023
INTANGIBLE
Net average pulp price	582.7
Latin America \| 2024
INTANGIBLE
Net average pulp price	638.3
Latin America \| 2025
INTANGIBLE
Net average pulp price	571.4
Latin America \| 2026
INTANGIBLE
Net average pulp price	587.3
Domestic (Brazil) \| 2022
INTANGIBLE
Net average pulp price	536.7
Domestic (Brazil) \| 2023
INTANGIBLE
Net average pulp price	504.3
Domestic (Brazil) \| 2024
INTANGIBLE
Net average pulp price	552.4
Domestic (Brazil) \| 2025
INTANGIBLE
Net average pulp price	494.6
Domestic (Brazil) \| 2026
INTANGIBLE
Net average pulp price	508.3

The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Percentage of post tax weighted average cost of capital.

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