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32 Operating Costs and Expenses (Details 6) - 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]      
Other operating costs and expenses, net R$ 352,188 R$ (352,188) R$ 413,950
Net Losses In The Decommissioning And Disposal Of Assets [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [1] 154,628 106,675 58,569
Financial offset for the use of water resources [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 103,737 105,310 110,971
Taxes [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 35,319 84,492 87,759
Compensation [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 66,550 30,949 45,712
Collection Charge [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 51,156 44,682
Advertising And Publicity [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 29,132 22,135 27,768
Leasing And Rent [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net (9,215) 40,016 32,037
Gain (Loss) On Sale Of Investments [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net (28,650)
Other Net Income Costs And Expenses [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [2] R$ (97,549) R$ (91,546) R$ 79,784
[1] Of the total recorded in 2019, R$ 124,067 refer to write-offs of Copel Telecomunicacoes' fixed assets (Note 17.8).
[2] The 2018 balance includes revenue of R$ 72,068 related to reimbursement from suppliers of goods from the wind farms of the Brisa Complex. The 2019 balance includes R$ 97,664 of water rate reversal (TCFRH).