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INCOME AND SOCIAL CONTRIBUTION TAXES - Rollforward (Details) - BRL (R$)
R$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Rollforward of net balance of deferred income tax    
Beginning balance R$ 8,676,432 R$ 1,555,165
Tax loss 123,938 412,759
Negative tax basis of social contribution 64,546 183,066
(Reversal)/provision for judicial liabilities 16,044 (32,471)
Operating provision (reversal) and other losses (19,292) 136,400
Exchange rate variation (1,153,796) 4,110,964
Derivative losses ("MtM") (908,874) 1,685,406
Amortization of fair value adjustment on business combination 7,978 37,917
Unrealized profit on inventories 50,522 (116,475)
Lease (17,614) 265,022
Goodwill - Tax benefit on unamortized goodwill (138,307) (253,018)
Property, plant and equipment - deemed cost 19,625 120,578
Accelerated tax depreciation 40,763 88,064
Borrowing cost 11,102 (5,487)
Fair value of biological assets (176,640) (184,377)
Deferred taxes on the result of associates abroad (87,637) 497,743
Tax credits - gains in tax lawsuit (ICMS from the PIS/COFINS calculation basis) (Note 20.3) (111,476)  
Other temporary differences (172,698) 175,176
Ending balance R$ 6,224,616 R$ 8,676,432