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16 Investments (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of subsidiaries [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 |  |  |  |
Operating revenues | 18,633,249 |  |  |
Operating costs and expenses | (13,347,822) |  |  |
Financial results | 866,271 |  |  |
Equity in earnings of investees | 193,547 |  |  |
Income tax and social contribution | 1,285,365 |  |  |
Net income (loss) | 3,909,750 |  |  |
Total comprehensive income | 3,730,595 | 1,939,685 | 1,405,644 |
STATEMENTS OF CASH FLOWS |  |  |  |
Cash flows from operational activities | 3,940,844 |  |  |
Cash flows from investment activities | (1,667,571) |  |  |
Cash flows from financing activities | (1,715,113) |  |  |
TOTAL EFFECTS ON CASH AND CASH EQUIVALENTS | 558,160 |  |  |
CHANGE IN CASH AND CASH EQUIVALENTS | 558,160 |  |  |
Compagas [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
ASSETS | 749,434 | 904,993 | 675,286 |
Current assets | 245,028 | 313,896 | 204,725 |
Noncurrent assets | 504,406 | 591,097 | 470,561 |
LIABILITIES | 749,434 | 904,993 | 675,286 |
Current liabilities | 173,144 | 236,190 | 133,769 |
Noncurrent liabilities | 81,230 | 110,475 | 106,900 |
Equity | 495,060 | 558,328 | 434,617 |
STATEMENT OF INCOME |  |  |  |
Operating revenues | 535,206 | 866,884 | 588,532 |
Operating costs and expenses | (452,495) | (662,306) | (515,594) |
Financial results | (764) | 43,186 | (2,411) |
Income tax and social contribution | (22,967) | (74,791) | (10,909) |
Net income (loss) | 58,980 | 172,973 | 59,618 |
Other comprehensive income | (343) | (1,277) | 187 |
Total comprehensive income | 58,637 | 171,696 | 59,805 |
STATEMENTS OF CASH FLOWS |  |  |  |
Cash flows from operational activities | 101,708 | 54,760 | 66,017 |
Cash flows from investment activities | (17,120) | (17,531) | (15,961) |
Cash flows from financing activities | (115,625) | 14,312 | (43,980) |
TOTAL EFFECTS ON CASH AND CASH EQUIVALENTS | (31,037) | 51,541 | 6,076 |
Cash and cash equivalents at the beginning of the year | 141,696 | 90,155 | 84,079 |
Cash and cash equivalents at the end of the year | 110,659 | 141,696 | 90,155 |
CHANGE IN CASH AND CASH EQUIVALENTS | (31,037) | 51,541 | 6,076 |
Elejor [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
ASSETS | 705,233 | 625,154 | 652,175 |
Current assets | 165,150 | 80,079 | 80,990 |
Noncurrent assets | 540,083 | 545,075 | 571,185 |
LIABILITIES | 705,233 | 625,154 | 652,175 |
Current liabilities | 95,465 | 85,647 | 124,880 |
Noncurrent liabilities | 596,278 | 496,648 | 473,318 |
Equity | 13,490 | 42,859 | 53,977 |
STATEMENT OF INCOME |  |  |  |
Operating revenues | 194,849 | 218,421 | 293,942 |
Operating costs and expenses | (67,323) | (86,237) | (89,931) |
Financial results | (172,049) | (92,728) | (89,301) |
Income tax and social contribution | 15,154 | (13,331) | (38,379) |
Net income (loss) | (29,369) | 26,125 | 76,331 |
Total comprehensive income | (29,369) | 26,125 | 76,331 |
STATEMENTS OF CASH FLOWS |  |  |  |
Cash flows from operational activities | 22,097 | 51,839 | 127,108 |
Cash flows from investment activities | (208) | (314) | (2,659) |
Cash flows from financing activities | (8,151) | (56,533) | (119,468) |
TOTAL EFFECTS ON CASH AND CASH EQUIVALENTS | 13,738 | (5,008) | 4,981 |
Cash and cash equivalents at the beginning of the year | 37,878 | 42,886 | 37,905 |
Cash and cash equivalents at the end of the year | 51,616 | 37,878 | 42,886 |
CHANGE IN CASH AND CASH EQUIVALENTS | 13,738 | (5,008) | 4,981 |
UEG Araucaria [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
ASSETS | 554,079 | 421,533 | 436,137 |
Current assets | 392,775 | 80,788 | 33,573 |
Noncurrent assets | 161,304 | 340,745 | 402,564 |
LIABILITIES | 554,079 | 421,533 | 436,137 |
Current liabilities | 309,265 | 91,066 | 42,185 |
Noncurrent liabilities | 6,603 | 14,727 | 23,290 |
Equity | 238,211 | 315,740 | 370,662 |
STATEMENT OF INCOME |  |  |  |
Operating revenues | 589,909 | 52,216 | 524 |
Operating costs and expenses | (647,516) | (131,596) | (94,970) |
Financial results | 203 | 832 | 2,275 |
Equity in earnings of investees |  | 916 |  |
Income tax and social contribution | (19,920) | (22,703) | 16,316 |
Net income (loss) | (77,324) | (100,335) | (75,855) |
Other comprehensive income | (205) | 132 |  |
Total comprehensive income | (77,529) | (100,203) | (75,855) |
STATEMENTS OF CASH FLOWS |  |  |  |
Cash flows from operational activities | 23,491 | (57,585) | (26,980) |
Cash flows from investment activities | 1,317 | (1,945) | (2,768) |
Cash flows from financing activities | 32,879 | 45,133 |  |
TOTAL EFFECTS ON CASH AND CASH EQUIVALENTS | 57,687 | (14,397) | (29,748) |
Cash and cash equivalents at the beginning of the year | 7,119 | 21,516 | 51,264 |
Cash and cash equivalents at the end of the year | 64,806 | 7,119 | 21,516 |
CHANGE IN CASH AND CASH EQUIVALENTS | R$ 57,687 | R$ (14,397) | R$ (29,748) |

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