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LOANS AND FINANCING - Principal and Interest (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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LOANS AND FINANCING |  |
Principal amount of loans and Financing | R$ 13,178,457 | R$ 16,207,120
Interest accrued of loans and Financing | 189,384 | 254,536
Total Loans and Financing | R$ 13,367,841 | R$ 16,461,656

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