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23. FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Details 9) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | R$ 39,469,700 |  | R$ 33,446,980 | R$ 30,188,421 |
Cost of Sales |  | (29,998,822) |  | (25,370,042) | (25,320,753) |
Interests on loans and borrowings |  | (1,545,825) |  | (1,516,677) |  |
Foreign Exchange variation on assets and liabilities |  | (1,179,236) |  | 100,480 |  |
Effects on Financial Result |  | (1,776,123) |  | (1,511,504) |  |
Other Comprehensive Income |  | 995,898 |  | 661,241 | R$ (4,311,739) | [1]
Asset / (Liability) net |  | (7,706) |  | 91,700 |  |
Other Comprehensive Income |  | (1,298,801) |  | (722,469) |  |
Inventories |  | 442,398 |  | 47,374 |  |
Cash flow hedges [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Interest Rate Derivatives result |  | (32,909) |  | 5,173 |  |
Cash flow hedges [member] | Derivative instruments - current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | 182,858 |  | 32,054 |  |
Other Comprehensive Income |  | 219,248 | [2] | 36,390 |  |
Cash flow hedges [member] | Non-derivative instruments - non-current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | (306,340) |  | 23,328 |  |
Other Comprehensive Income |  | (883,218) |  | (576,877) |  |
Cash flow / fair value [member] | Designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | (48,499) |  | 69,674 |  |
Cash flow / fair value [member] | Derivatives result [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Inventories |  | 442,398 |  | 47,374 |  |
Not designated [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Foreign Exchange Derivatives result |  | 981,847 |  | (178,523) |  |
Not designated [member] | Not designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | 40,793 |  | 22,026 |  |
Net investment [member] | Non-derivative instruments - non-current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | (277,856) |  | (66,818) |  |
Other Comprehensive Income |  | (344,674) |  | (66,818) |  |
Net sales [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | 40,841,803 |  | 33,465,194 |  |
Derivatives result [member] | Cash flow hedges [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | (1,372,103) |  | (18,214) |  |
Derivatives result [member] | Cash flow / fair value [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Cost of Sales |  | 182,662 |  | 30,238 |  |
Cost of sales [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Cost of Sales |  | 29,816,160 |  | 25,339,804 |  |
Foreign exchange [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | 39,469,700 |  | 33,446,980 |  |
Foreign Exchange variation on assets and liabilities |  | (1,179,236) |  | 100,480 |  |
Effects on Financial Result |  | (197,389) |  | (78,043) |  |
Other Comprehensive Income | [3] | (613,089) |  | 2,620 |  |
Asset / (Liability) net |  | 151,000 |  | 115,338 |  |
Other Comprehensive Income | [3] | (1,179,950) |  | (566,860) |  |
Inventories |  |  |  |  |  |
Foreign exchange [member] | Cash flow hedges [member] | Derivative instruments - current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | (28,893) |  | 46,110 |  |
Other Comprehensive Income |  | 47,942 | [2] | 76,835 |  |
Foreign exchange [member] | Cash flow hedges [member] | Non-derivative instruments - non-current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | (306,340) |  | 23,328 |  |
Other Comprehensive Income |  | (883,218) |  | (576,877) |  |
Foreign exchange [member] | Cash flow / fair value [member] | Designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | 95,558 |  | 93,312 |  |
Foreign exchange [member] | Not designated [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Foreign Exchange Derivatives result |  | 981,847 |  | (178,523) |  |
Foreign exchange [member] | Not designated [member] | Not designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | 55,442 |  | 22,026 |  |
Foreign exchange [member] | Net investment [member] | Non-derivative instruments - non-current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | (277,856) |  | (66,818) |  |
Other Comprehensive Income |  | (344,674) |  | (66,818) |  |
Foreign exchange [member] | Net sales [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | 40,841,803 |  | 33,465,194 |  |
Foreign exchange [member] | Derivatives result [member] | Cash flow hedges [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Net Revenue |  | (1,372,103) |  | (18,214) |  |
Commodities [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Cost of Sales |  | 29,998,822 |  | 25,370,042 |  |
Other Comprehensive Income | [3] | 211,751 |  | (14,056) |  |
Asset / (Liability) net |  | (144,057) |  | (23,638) |  |
Other Comprehensive Income | [3] | 171,306 |  | (40,445) |  |
Inventories |  | 442,398 |  | 47,374 |  |
Commodities [member] | Cash flow hedges [member] | Derivative instruments - current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  | 211,751 |  | (14,056) |  |
Other Comprehensive Income |  | 171,306 | [2] | (40,445) |  |
Commodities [member] | Cash flow hedges [member] | Non-derivative instruments - non-current [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Other Comprehensive Income |  |  |  |  |  |
Commodities [member] | Cash flow / fair value [member] | Designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | (144,057) |  | (23,638) |  |
Commodities [member] | Cash flow / fair value [member] | Derivatives result [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Inventories |  | 442,398 |  | 47,374 |  |
Commodities [member] | Not designated [member] | Not designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  |  |  |  |  |
Commodities [member] | Derivatives result [member] | Cash flow / fair value [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Cost of Sales |  | 182,662 |  | 30,238 |  |
Other Comprehensive Income |  | 0 |  |  |  |
Commodities [member] | Cost of sales [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Cost of Sales |  | 29,816,160 |  | 25,339,804 |  |
Interest rate [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Interests on loans and borrowings |  | (1,545,825) |  | (1,516,677) |  |
Effects on Financial Result |  | (1,578,734) |  | (1,511,504) |  |
Asset / (Liability) net |  | (14,649) |  |  |  |
Other Comprehensive Income | [3] |  |  |  |  |
Inventories |  |  |  |  |  |
Interest rate [member] | Cash flow hedges [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Interest Rate Derivatives result |  | (32,909) |  | 5,173 |  |
Interest rate [member] | Cash flow / fair value [member] | Designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  |  |  |  |  |
Interest rate [member] | Not designated [member] | Not designated derivatives [member] |  |  |  |  |  |
DisclosureOfFinancialInstrumentsAndRisksManagementLineItems [Line Items] |  |  |  |  |  |
Asset / (Liability) net |  | R$ (14,649) |  |  |  |
[1] | All changes in other comprehensive income are presented net of taxes.
[2] | Includes R$6,251 related to the time value of the foreign exchange option contracts, and R$6,178 related to the time value of the commodity options contracts.
[3] | All effects are presented gross of taxes.

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