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9. PROPERTY, PLANT AND EQUIPMENT (Details Narrative) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, plant and equipment [abstract]    
Capitalized borrowing costs R$ 117,189 R$ 71,611
Capitalized borrowing non-specific projects rate 6.58% 6.31%