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LOANS, FINANCING AND DEBENTURES - Rollforward in loans, financing and debentures (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
LOANS, FINANCING AND DEBENTURES
Beginning balance	R$ 63,684,326	R$ 35,737,509
Reclassification - accounts payable from lease operations		(18,225)
Fundraising	14,761,796	18,993,837
Premium with repurchase of bonds	391,390
Exchange rate variation, net	13,365,471	1,781,562
Settlement of principal	(19,092,810)	(13,994,708)
Settlement of interest	(3,244,949)	(2,977,957)
Amortization of fundraising costs	87,959	185,807
Other	38,826	(52,845)
Ending balance	72,899,882	63,684,326
Fibria
LOANS, FINANCING AND DEBENTURES
Amounts from the business combination		20,667,096
Settlement of premium with repurchase of bonds	(378,381)
PCH / FACEPA
LOANS, FINANCING AND DEBENTURES
Interest accrued	R$ 3,286,254	R$ 3,362,250

X

- Definition

The amount of interest and other costs that an entity incurs in connection with the borrowing of funds.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of outstanding funds that the entity is obligated to repay.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amortization of debt issuance costs.

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The increase (decrease) in borrowings due to exchange differences on translation.

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The increase (decrease) in borrowings due to interest costs paid.

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- Definition

The increase (decrease) in borrowings due to settlement of premium with repurchase of bonds.

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New loans and financing during the period.

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The amount of premium expenses with repurchase of bonds.

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Amount of reclassifications from lease balances to accounts payable from lease operations due to adoption of IFRS 16.

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The reduction in the carrying amount of debt due to repayments of principal during the period.

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