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17. TRADE PAYABLES (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current trade payables [member]    
TradePayablesLineItems [Line Items]    
Trade payables R$ 4,893,589 R$ 3,012,654
(-) Adjustment present value (74,050)  
Trade payable, net 4,819,539 R$ 3,012,654
Non current trade payables [member]    
TradePayablesLineItems [Line Items]    
Trade payables 594,051  
(-) Adjustment present value (50,524)  
Trade payable, net R$ 543,527