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INVENTORIES - Balances (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
INVENTORIES    
Work in process R$ 96,140 R$ 81,465
Spare parts and other 678,983 508,444
Inventories 4,637,485 4,009,335
Pulp | Domestic (Brazil)    
INVENTORIES    
Finished goods 748,588 553,229
Pulp | Foreign    
INVENTORIES    
Finished goods 1,037,760 1,102,994
Paper | Domestic (Brazil)    
INVENTORIES    
Finished goods 315,068 225,058
Paper | Foreign    
INVENTORIES    
Finished goods 95,383 87,638
Wood    
INVENTORIES    
Raw materials 1,094,058 1,012,113
Operating supplies and packaging    
INVENTORIES    
Raw materials R$ 571,505 R$ 438,394