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16 Investments (Details 4) - BRL (R$) R$ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 02, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of associates [line items] |  |  |  |  |
ASSETS |  | R$ 38,312,550 | R$ 35,930,100 |  |
Current assets |  | 7,909,196 | 6,677,846 |  |
Noncurrent assets |  | 30,403,354 | 29,252,254 |  |
Current liabilities |  | 5,345,621 | 6,695,114 |  |
Noncurrent liabilities |  | 15,368,717 | 12,898,772 |  |
Equity |  | 17,598,212 | 16,336,214 | R$ 15,510,503 | R$ 14,978,142
STATEMENT OF INCOME |  |  |  |  |
Net operating revenues |  | 16,244,274 | 14,934,780 | 14,024,573 |
Operating costs and expenses |  | (11,760,176) | (11,501,688) | (10,665,890) |
Income tax and social contribution |  | 639,326 | 511,993 | 274,686 |
Net income | R$ 2,070,551 | 2,062,869 | 1,444,004 | 1,118,255 |
Total comprehensive income |  | 1,939,685 | 1,405,644 | 1,086,917 |
Dona Francisca [Member] |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |
ASSETS |  | 130,883 | 134,141 | 138,079 |
Current assets |  | 13,406 | 12,493 | 10,304 |
Noncurrent assets |  | 117,477 | 121,648 | 127,775 |
LIABILITIES |  | 130,883 | 134,141 | 138,079 |
Current liabilities |  | 4,344 | 4,231 | 4,144 |
Noncurrent liabilities |  | 3,118 | 3,361 | 4,443 |
Equity |  | 123,421 | 126,549 | 129,492 |
STATEMENT OF INCOME |  |  |  |  |
Net operating revenues |  | 70,717 | 70,716 | 70,716 |
Operating costs and expenses |  | (25,957) | (25,268) | (30,379) |
Financial income (expense) |  | 475 | 366 | 835 |
Income tax and social contribution |  | (2,454) | (2,446) | (2,632) |
Net income |  | 42,781 | 43,368 | 38,540 |
Other comprehensive income |  |  |  |  |
Total comprehensive income |  | R$ 42,781 | R$ 43,368 | R$ 38,540 |
Investment interest - % |  | 23.0303% | 23.0303% | 23.0303% |
Investment book value |  | R$ 28,423 | R$ 29,144 | R$ 29,821 |
Foz Do Chopim [Member] |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |
ASSETS |  | 61,635 | 106,736 | 61,163 |
Current assets |  | 31,054 | 73,786 | 21,553 |
Noncurrent assets |  | 30,581 | 32,950 | 39,610 |
LIABILITIES |  | 61,635 | 106,736 | 61,163 |
Current liabilities |  | 2,354 | 57,603 | 1,808 |
Noncurrent liabilities |  | 25,243 | 26,133 | 22,776 |
Equity |  | 34,038 | 23,000 | 36,579 |
STATEMENT OF INCOME |  |  |  |  |
Net operating revenues |  | 56,929 | 46,479 | 40,441 |
Operating costs and expenses |  | 16,278 | (2,020) | (21,124) |
Financial income (expense) |  | 621 | (638) | 809 |
Income tax and social contribution |  | (2,346) | (6,880) | (1,547) |
Net income |  | 38,926 | 36,941 | 18,579 |
Other comprehensive income |  |  |  |  |
Total comprehensive income |  | R$ 38,926 | R$ 36,941 | R$ 18,579 |
Investment interest - % |  | 35.77% | 35.77% | 35.77% |
Investment book value |  | R$ 12,175 | R$ 8,227 | R$ 13,084 |

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