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23. FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Details 4) - Foreign exchange risk [member] - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure R$ (110,210) R$ (399,203)
Argentinian peso (ARS)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure (5,310) (13,236)
Euros (EUR)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure 104,539 23,624
Pound sterling (GBP)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure 9,394 6,949
Yen (JPY)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure 29,976 (17,285)
Rubles (RUB)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure (1,261) 2,780
Turkish liras (TRY)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure 178,906 (418,576)
U.S. dollars (USD)    
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items]    
Net P and L Exposure R$ (426,454) R$ 16,541