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32 Operating Costs and Expenses (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | R$ (11,760,176) | R$ (11,501,688) | R$ (10,665,890)
Selling expenses | (207,059) | (148,709) | (169,050)
General and administrative expenses | (734,300) | (723,534) | (685,675)
Other operating expenses, net | (458,815) | (302,690) | (464,316)
Total operating costs and expenses | (13,160,350) | (12,676,621) | (11,984,931)
Electricity Purchased For Resale [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (6,105,274) | (6,361,178) | (6,165,450)
Selling expenses |  |  |
General and administrative expenses |  |  |
Other operating expenses, net |  |  |
Total operating costs and expenses | (6,105,274) | (6,361,178) | (6,165,450)
Charge Of The Main Distribution And Transmission Grid [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (1,249,275) | (1,176,780) | (712,030)
Selling expenses |  |  |
General and administrative expenses |  |  |
Other operating expenses, net |  |  |
Total operating costs and expenses | (1,249,275) | (1,176,780) | (712,030)
Personnel And Management [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (945,312) | (978,878) | (984,011)
Selling expenses | (13,937) | (18,460) | (20,435)
General and administrative expenses | (366,133) | (360,447) | (338,898)
Other operating expenses, net |  |  |
Total operating costs and expenses | (1,325,382) | (1,357,785) | (1,343,344)
Pension And Healthcare Plans [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (169,476) | (176,102) | (175,479)
Selling expenses | (1,914) | (2,447) | (2,424)
General and administrative expenses | (66,936) | (65,201) | (59,694)
Other operating expenses, net |  |  |
Total operating costs and expenses | (238,326) | (243,750) | (237,597)
Materials And Supplies [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (75,417) | (68,920) | (71,535)
Selling expenses | (289) | (655) | (968)
General and administrative expenses | (6,446) | (12,182) | (10,621)
Other operating expenses, net |  |  |
Total operating costs and expenses | (82,152) | (81,757) | (83,124)
Materials And Supplies For Power Electricity [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (49,352) | (19,729) | (97,360)
Selling expenses |  |  |
General and administrative expenses |  |  |
Other operating expenses, net |  |  |
Total operating costs and expenses | (49,352) | (19,729) | (97,360)
Natural Gas And Supplies For Gas Business [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (585,233) | (412,618) | (309,542)
Selling expenses |  |  |
General and administrative expenses |  |  |
Other operating expenses, net |  |  |
Total operating costs and expenses | (585,233) | (412,618) | (309,542)
Third-Party Services [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (433,429) | (392,869) | (386,435)
Selling expenses | (23,002) | (23,266) | (18,826)
General and administrative expenses | (156,690) | (156,092) | (116,254)
Other operating expenses, net |  |  |
Total operating costs and expenses | (613,121) | (572,227) | (521,515)
Depreciation And Amortization [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (1,031,880) | (709,575) | (686,007)
Selling expenses | (9) | (15) | (16)
General and administrative expenses | (47,228) | (26,015) | (32,070)
Other operating expenses, net | (14,719) | (13,574) | (13,506)
Total operating costs and expenses | (1,093,836) | (749,179) | (731,599)
Credit Losses Provisions And Reversals [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | 33,290 | 18,920 | 122,782
Selling expenses | (153,640) | (81,936) | (90,478)
General and administrative expenses |  |  |
Other operating expenses, net | (254,465) | (243,681) | (397,843)
Total operating costs and expenses | (374,815) | (306,697) | (365,539)
Construction Cost [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (1,091,396) | (1,052,208) | (1,003,881)
Selling expenses |  |  |
General and administrative expenses |  |  |
Other operating expenses, net |  |  |
Total operating costs and expenses | (1,091,396) | (1,052,208) | (1,003,881)
Other Operating Costs And Expenses Net [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Operating costs and expenses | (57,422) | (171,751) | (196,942)
Selling expenses | (14,269) | (21,930) | (35,903)
General and administrative expenses | (90,867) | (103,597) | (128,138)
Other operating expenses, net | (189,630) | (45,435) | (52,967)
Total operating costs and expenses | R$ (352,188) | R$ (342,713) | R$ (413,950)

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