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Financial Instruments and Risks - Settled Derivatives (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financial Instruments and Risks |  |
Cash (paid) received | R$ (1,331,513) | R$ (37,992)
Payment of premium on derivatives | 254,902 |
Proceeds from premium on derivatives |  | 77,687
Cash flow hedge | Exchange hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | (1,345,719) | 39,308
Cash flow hedge | Exchange hedge | Zero-cost collar (R$ vs. US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (110,271) | 28,159
Cash flow hedge | Exchange hedge | NDF (R$ vs. US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | (1,235,448) | 11,110
Cash flow hedge | Exchange hedge | NDF (MXN vs. US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | 39
Commodity hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | 2,631
Commodity hedge | Bunker oil |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | 2,631
Debt hedge | Exchange hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | 19,145 | (93,167)
Debt hedge | Exchange hedge | Swap CDI vs. Fixed (US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | 19,145 | 78,411
Debt hedge | Exchange hedge | Fixed Swap (US$) vs. CDI |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | (8,809)
Debt hedge | Exchange hedge | Swap CDI vs. Libor (US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | (162,769)
Debt hedge | Interest hedge |  |
Financial Instruments and Risks |  |
Cash (paid) received | (4,939) | 13,236
Debt hedge | Interest hedge | Swap Libor vs. Fixed (US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received | R$ (4,939) | (2,588)
Debt hedge | Interest hedge | Swap Coupon vs. Fixed (US$) |  |
Financial Instruments and Risks |  |
Cash (paid) received |  | R$ 15,824

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