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INVENTORIES - Summary (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
INVENTORIES    
Inventories R$ 9,169,417 R$ 7,659,737
Gross    
INVENTORIES    
Finished products 3,894,698 3,302,569
Work in progress 2,045,158 1,426,607
Raw materials 1,934,958 1,611,334
Storeroom supplies 786,401 974,412
Imports in transit 514,321 384,123
Accumulated impairment losses    
INVENTORIES    
Inventories R$ (6,119) R$ (39,308)