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16 Investments (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of associates [line items] |  |  |  |
ASSETS | R$ 46,784,664 |  |  |
Current assets | 11,407,431 |  |  |
Noncurrent assets | 35,377,233 |  |  |
Current liabilities | 9,654,392 |  |  |
Noncurrent liabilities | 16,879,754 |  |  |
Equity | 20,250,518 | R$ 17,598,212 | R$ 16,336,214 | R$ 15,345,579
STATEMENT OF INCOME |  |  |  |
Net operating revenues | 18,633,249 |  |  |
Operating costs and expenses | (13,347,822) |  |  |
Income tax and social contribution | 1,285,365 |  |  |
Net income | 3,909,750 |  |  |
Total comprehensive income | 3,730,595 | 1,939,685 | 1,405,644 |
Dona Francisca [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
ASSETS | 128,798 | 130,883 | 134,141 |
Current assets | 14,562 | 13,406 | 12,493 |
Noncurrent assets | 114,236 | 117,477 | 121,648 |
LIABILITIES | 128,798 | 130,883 | 134,141 |
Current liabilities | 4,452 | 4,344 | 4,231 |
Noncurrent liabilities | 2,119 | 3,118 | 3,361 |
Equity | 122,227 | 123,421 | 126,549 |
STATEMENT OF INCOME |  |  |  |
Net operating revenues | 70,314 | 70,717 | 70,716 |
Operating costs and expenses | (26,171) | (25,957) | (25,268) |
Financial income (expense) | 208 | 475 | 366 |
Income tax and social contribution | (2,343) | (2,454) | (2,446) |
Net income | 42,008 | 42,781 | 43,368 |
Total comprehensive income | R$ 42,008 | R$ 42,781 | R$ 43,368 |
Investment interest - % | 23.0303% | 23.0303% | 23.0303% |
Investment book value | R$ 28,147 | R$ 28,423 | R$ 29,144 |
Foz Do Chopim [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
ASSETS | 62,635 | 61,635 | 106,736 |
Current assets | 33,378 | 31,054 | 73,786 |
Noncurrent assets | 29,257 | 30,581 | 32,950 |
LIABILITIES | 62,635 | 61,635 | 106,736 |
Current liabilities | 34,723 | 2,354 | 57,603 |
Noncurrent liabilities |  | 25,243 | 26,133 |
Equity | 27,912 | 34,038 | 23,000 |
STATEMENT OF INCOME |  |  |  |
Net operating revenues | 55,740 | 56,929 | 46,479 |
Operating costs and expenses | (21,260) | (16,278) | (2,020) |
Financial income (expense) | (5,527) | 621 | (638) |
Income tax and social contribution | (2,035) | (2,346) | (6,880) |
Net income | 26,918 | 38,926 | 36,941 |
Total comprehensive income | R$ 26,918 | R$ 38,926 | R$ 36,941 |
Investment interest - % | 35.77% | 35.77% | 35.77% |
Investment book value | R$ 9,986 | R$ 12,175 | R$ 8,227 |

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