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Financial Instruments and Risks Management - Fair Value of Loans and Financing (Details) - Discount rate - Loans, financing and debentures - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Financial Instruments and Risks Management |  |
Financial Liabilities, Fair Value | R$ 66,707,543 | R$ 40,048,279
Foreign | Bonds | Fixed |  |
Financial Instruments and Risks Management |  |
Yield used to discount | U.S.$ | U.S.$
Financial Liabilities, Fair Value | R$ 30,066,087 | R$ 15,035,165
Foreign | Export credits ("Pre payment") |  |
Financial Instruments and Risks Management |  |
Yield used to discount | LIBOR U.S.$ | LIBOR U.S.$
Financial Liabilities, Fair Value | R$ 17,213,963 | R$ 12,819,072
Foreign | Export credits ("Finnvera") |  |
Financial Instruments and Risks Management |  |
Yield used to discount |  | LIBOR U.S.$
Financial Liabilities, Fair Value |  | R$ 832,907
Foreign | Export credits (ACC - pre-payment) |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 575,521 | R$ 1,732,088
Domestic | BNP - Forest Financing |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 193,646 |
Domestic | BNDES | TJLP |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 1,895,959 | R$ 206,601
Domestic | BNDES | TLP |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 535,812 |
Domestic | BNDES | Fixed |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 113,979 | R$ 348,827
Domestic | BNDES | SELIC |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 693,969 |
Domestic | BNDES | Currency basket |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 54,420 | R$ 169,243
Domestic | CRA ("Agribusiness Receivables Certificates") |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 6,039,983 | R$ 2,383,775
Domestic | Debentures |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 5,534,691 | R$ 4,721,603
Domestic | FINAME |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 14,168 |
Domestic | FINEP |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 5,138 |
Domestic | Export credit note |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 1,445,383 | R$ 1,501,623
Domestic | NCR ("Rural Credit Notes") |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 | DI 1
Financial Liabilities, Fair Value | R$ 288,122 | R$ 297,375
Domestic | Export credits ("Pre payment") |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 1,464,798 |
Domestic | FDCO ("West Center Development Fund") |  |
Financial Instruments and Risks Management |  |
Yield used to discount | DI 1 |
Financial Liabilities, Fair Value | R$ 571,904 |

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