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13. FINANCIAL INSTRUMENTS (Details 16) R$ in Thousands | Dec. 31, 2018 BRL (R$) | Dec. 31, 2017 BRL (R$) | Dec. 31, 2016 BRL (R$) | Dec. 31, 2015 BRL (R$)
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Financial Instruments Details 16Abstract |  |  |  |
Shareholder's equity (equity) | R$ 10,013,440 | R$ 8,288,229 | R$ 7,384,521 | R$ 7,091,288
Borrowings and Financing (Third-party capital) | R$ 28,827,074 | R$ 29,510,844 |  |
Gross Debit/Shareholder's equity | 2.88 | 3.56 |  |

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