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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Price risk (Details) - Commodity price risk | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 BRL (R$) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 BRL (R$)
Probable |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Percentage change in sensitivity analysis scenario |  | 2.16% |
Possible (+25%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Percentage change in sensitivity analysis scenario |  | 2.70% |
Remote (+50%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Percentage change in sensitivity analysis scenario |  | 3.24% |
Embedded derivative | Probable |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | R$ 354,900,000 |  |
Embedded derivative | Possible (+25%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | (158,373,000) |  |
Embedded derivative | Remote (+50%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | (324,287,000) |  |
Oil derivative | Bunker oil |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Risk exposure |  | $ 37,757 | R$ 364.5
VLSFO/Brent derivative | Probable |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | 15,759,000 |  |
VLSFO/Brent derivative | Possible (+25%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | 43,614,000 |  |
VLSFO/Brent derivative | Remote (+50%) |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Effect on fair value of assets attributable to an increase in measurement input. | R$ 87,227,000 |  |

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