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Financial Instruments and Risks - Derivatives Outstanding by Type of Contract, Classified (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financial Instruments and Risks |  |
Current assets | R$ 352,454 | R$ 77,090
Non-current assets | 141,480 | 56,820
Current liabilities | (596,530) | (23,819)
Non-current liabilities | (1,040,170) | (104,077)
Total, net | R$ (1,142,766) | R$ 6,014

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