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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Fair value settled amounts (Details) - BRL (R$) R$ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Financial Instruments and Risks |  |
Cash (paid) received | R$ (1,834,250) | R$ (135,449)
Operational Hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | (993,295) | (40,469)
Operational Hedge | Zero cost collar (U.S.$ x R$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (962,595) | (104,040)
Operational Hedge | NDF (R$ x US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (30,700) | 63,571
Commodity hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | (36,805) | 3,804
Commodity hedge | Swap Bunker (oil) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (36,805) | 3,804
Debt hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | (804,150) | (98,784)
Debt hedge | Swap CDI x Fixed (U.S.$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (369,601) | (68,362)
Debt hedge | Swap IPCA x CDI |  |
Financial Instruments and Risks |  |
Cash (paid) received | (441,056) | 23,024
Debt hedge | Swap IPCA x U.S.$ |  |
Financial Instruments and Risks |  |
Cash (paid) received | 10,054 |
Debt hedge | Swap Pre-Fixed to U.S.$ (U.S.$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | 59,351 | (26,358)
Debt hedge | Swap LIBOR x Fixed (U.S.$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | R$ (62,898) | R$ (27,088)

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