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35 Financial Instruments (Details 11) - BRL (R$) R$ / shares in Units, R$ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Less: Cash and cash equivalents | R$ 2,941,727 | R$ 1,948,409 | R$ 1,040,075 | R$ 982,073
Net debt | 3,142,383 | 4,047,307 |  |
Equity | 17,598,212 | 16,336,214 | R$ 15,510,503 | R$ 14,978,142
Capital Management Risk [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Loans and financing | 3,142,383 | 4,047,307 |  |
Debentures | 8,429,710 | 7,518,131 |  |
Less: Cash and cash equivalents | 2,941,727 | 1,948,409 |  |
Less: Bonds and securities | 3,112 | 124,862 |  |
Capital Management Risk [Member] | Indebtedness [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Loans and financing | 3,168,710 | 4,047,307 |  |
Debentures | 8,540,366 | 7,518,131 |  |
Less: Cash and cash equivalents | 2,941,727 | 1,948,409 |  |
Less: Bonds and securities | 282,081 | 344,296 |  |
Net debt | 8,485,268 | 9,272,733 |  |
Equity | R$ 17,598,212 | R$ 16,336,214 |  |
Equity indebtedness (in R$ per share) | R$ 0.48 | R$ 0.57 |  |

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