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9 Net Sectorial Financial Assets and Liabilities (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | R$ 582,288 | R$ 59,699 |
Operating revenues, constitution | 515,934 | 965,452 |
Operating revenues, amortization | (490,877) | 19,892 |
Financial results, updating | 41,625 | 20,219 |
Rate flags | (277,265) | (482,974) |
Net sectorial financial assets and liabilities, ending | 371,705 | 582,288 |
Sectorial financial assets, current | 355,570 | 421,184 | R$ 171,609
Sectorial financial assets, noncurrent | 118,419 | 257,635 | 171,609
Sectorial financial liabilities, current |  |  | 192,819
Sectorial financial liabilities, noncurrent | (102,284) | (96,531) | R$ (90,700)
Adjusting Portion A [Member] | Electricity Purchased For Resale - Itaipu [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 886,243 | 537,704 |
Operating revenues, constitution | 533,057 | 661,144 |
Operating revenues, amortization | (670,501) | (348,586) |
Financial results, updating | 44,528 | 35,981 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 793,327 | 886,243 |
Adjusting Portion A [Member] | Electricity Purchased For Resale - Cva Energ [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 626,891 | 497,885 |
Operating revenues, constitution | 358,200 | 710,482 |
Operating revenues, amortization | (546,801) | (129,555) |
Financial results, updating | 29,909 | 31,053 |
Rate flags | (202,411) | (482,974) |
Net sectorial financial assets and liabilities, ending | 265,788 | 626,891 |
Adjusting Portion A [Member] | Transport Of Energy Using The Transmission System - Basic Grid [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | (30,514) | 47,239 |
Operating revenues, constitution | 22,917 | (36,959) |
Operating revenues, amortization | 23,688 | (43,101) |
Financial results, updating | (3,053) | 2,307 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 13,038 | (30,514) |
Adjusting Portion A [Member] | Transport Of Energy Purchased From Itaipu [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 23,250 | 12,923 |
Operating revenues, constitution | 19,531 | 21,526 |
Operating revenues, amortization | (19,692) | (12,194) |
Financial results, updating | 1,302 | 995 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 24,391 | 23,250 |
Adjusting Portion A [Member] | System Service Charges - ESS [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | (481,972) | (591,408) |
Operating revenues, constitution | (188,280) | (302,226) |
Operating revenues, amortization | 427,177 | 443,817 |
Financial results, updating | (21,874) | (32,155) |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | (264,949) | (481,972) |
Adjusting Portion A [Member] | Energy Development Account - CDE [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 159,084 | (141,893) |
Operating revenues, constitution | 110,752 | 231,308 |
Operating revenues, amortization | (127,190) | 69,851 |
Financial results, updating | 10,282 | (182) |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 152,928 | 159,084 |
Adjusting Portion A [Member] | Proinfa [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 2,989 | (5,188) |
Operating revenues, constitution | 17,396 | 6,111 |
Operating revenues, amortization | (12,636) | 2,024 |
Financial results, updating | 719 | 42 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 8,468 | 2,989 |
Other Financial Components [Member] | Neutrality [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 123,028 | 121,247 |
Operating revenues, constitution | (1,122) | 100,280 |
Operating revenues, amortization | (74,698) | (100,661) |
Financial results, updating | 1,298 | 2,162 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | 48,506 | 123,028 |
Other Financial Components [Member] | CVA Angra III Adjustment [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 6,272 | 48,193 |
Operating revenues, constitution |  | 8,482 |
Operating revenues, amortization | (6,272) | (57,214) |
Financial results, updating |  | 6,811 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending |  | 6,272 |
Other Financial Components [Member] | Hydrological Risk [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | (319,033) | (187,928) |
Operating revenues, constitution | (324,504) | (310,975) |
Operating revenues, amortization | 304,197 | 189,289 |
Financial results, updating | (7,820) | (9,419) |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | (347,160) | (319,033) |
Other Financial Components [Member] | Tariff Refunds [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | (180,963) | (145,774) |
Operating revenues, constitution | (89,327) | (80,493) |
Operating revenues, amortization | 83,900 | 52,290 |
Financial results, updating | (7,863) | (6,986) |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | (194,253) | (180,963) |
Other Financial Components [Member] | Overcontracting [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | (238,416) | (136,325) |
Operating revenues, constitution | (22,166) | (54,421) |
Operating revenues, amortization | 173,087 | (37,176) |
Financial results, updating | (5,774) | (10,494) |
Rate flags | (74,854) |  |
Net sectorial financial assets and liabilities, ending | (168,123) | (238,416) |
Other Financial Components [Member] | Others [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 5,429 | 3,024 |
Operating revenues, constitution | (905) | 11,193 |
Operating revenues, amortization | 294 | (8,892) |
Financial results, updating | (29) | 104 |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | (448) | 5,429 |
Other Financial Components [Member] | Offset of Energy Surplus/Deficit Under CCEAR Bilateral Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Net sectorial financial assets and liabilities, beginning | 5,237 |  |
Operating revenues, constitution | 80,385 |  |
Operating revenues, amortization | (45,430) |  |
Financial results, updating |  |  |
Rate flags |  |  |
Net sectorial financial assets and liabilities, ending | R$ 40,192 | R$ 5,237 |

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