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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
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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

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