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1 Operations (Details)
 12 Months Ended
Dec. 31, 2019
Copel Geracao e Transmissao S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Copel Geração e Transmissão S.A. (Copel GeT)
Headquarters Curitiba/PR
Main activity Production and transmission of electricity
Interest 100.00%
Investor Copel
Copel Distribuicao S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Copel Distribuição S.A. (Copel DIS)
Headquarters Curitiba/PR
Main activity Distribution and marketing of electricity
Interest 100.00%
Investor Copel
Copel Telecomunicacoes S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Copel Telecomunicações S.A. (Copel TEL)
Headquarters Curitiba/PR
Main activity Telecommunication and communication
Interest 100.00%
Investor Copel
Copel Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Copel Renováveis S.A. (Copel REN) [1]
Headquarters Curitiba/PR [1]
Main activity Control and management of interests [1]
Interest 100.00% [1]
Investor Copel [1]
Copel Comercializacao S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Copel Comercialização S.A. (Copel Energia)
Headquarters Curitiba/PR
Main activity Commercialization of electricity
Interest 100.00%
Investor Copel
Companhia Paranaense de Gas - Compagas [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Companhia Paranaense de Gás - Compagás
Headquarters Curitiba/PR
Main activity Distribution of pipeline gas
Interest 51.00%
Investor Copel
Elejor - Centrais Eletricas do Rio Jordao S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Elejor - Centrais Elétricas do Rio Jordão S.A.
Headquarters Curitiba/PR
Main activity Production of electricity
Interest 70.00%
Investor Copel
UEG Araucaria Ltda. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name UEG Araucária Ltda. (UEG)
Headquarters Curitiba/PR
Main activity Production of electricity from natural gas
Interest 20.30%
Investor Copel
UEG Araucaria Ltda. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name UEG Araucária Ltda. (UEG)
Headquarters Curitiba/PR
Main activity Production of electricity from natural gas
Interest 60.90%
Investor Copel GeT
Sao Bento Energia, Investimentos e Participacoes S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name São Bento Energia, Investimentos e Participações S.A. (São Bento)
Headquarters Curitiba/PR
Main activity Control and management of interests
Interest 100.00%
Investor Copel GeT
Nova Asa Branca I Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Nova Asa Branca I Energias Renováveis S.A.
Headquarters S. Miguel do Gostoso/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Nova Asa Branca II Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Nova Asa Branca II Energias Renováveis S.A.
Headquarters Parazinho/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Nova Asa Branca III Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Nova Asa Branca III Energias Renováveis S.A.
Headquarters Parazinho/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Nova Eurus IV Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Nova Eurus IV Energias Renováveis S.A.
Headquarters Touros/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Santa Maria Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Santa Maria Energias Renováveis S.A.
Headquarters Maracanaú/CE
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Santa Helena Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Santa Helena Energias Renováveis S.A.
Headquarters Maracanaú/CE
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Ventos de Santo Uriel S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Ventos de Santo Uriel S.A.
Headquarters João Câmara/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Cutia Empreendimentos Eolicos S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Cutia Empreendimentos Eólicos S.A. (Cutia)
Headquarters Curitiba/PR
Main activity Control and management of interests
Interest 100.00%
Investor Copel GeT
Costa Oeste Transmissora de Energia S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Costa Oeste Transmissora de Energia S.A.
Headquarters Curitiba/PR
Main activity Transmission of electricity
Interest 100.00%
Investor Copel GeT
Marumbi Transmissora de Energia S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Marumbi Transmissora de Energia S.A.
Headquarters Curitiba/PR
Main activity Transmission of electricity
Interest 100.00%
Investor Copel GeT
Uirapuru Transmissora de Energia S.A [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Uirapuru Transmissora de Energia S.A
Headquarters Florianópolis
Main activity Transmission of electricity
Interest 100.00%
Investor Copel GeT
Bela Vista Geracao de Energia S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Bela Vista Geração de Energia S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity [2]
Interest 100.00% [2]
Investor Copel GeT [2]
F.D.A. Geracao de Energia Eletrica S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name F.D.A. Geração de Energia Elétrica S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity [2]
Interest 100.00% [2]
Investor Copel GeT [2]
Jandaira I Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Jandaíra I Energias Renováveis S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity from wind sources [2]
Interest 100.00% [2]
Investor Copel GeT [2]
Jandaira II Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Jandaíra II Energias Renováveis S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity from wind sources [2]
Interest 100.00% [2]
Investor Copel GeT [2]
Jandaira III Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Jandaíra III Energias Renováveis S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity from wind sources [2]
Interest 100.00% [2]
Investor Copel GeT [2]
Jandaira IV Energias Renovaveis S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Jandaíra IV Energias Renováveis S.A. [2]
Headquarters Curitiba/PR [2]
Main activity Production of electricity from wind sources [2]
Interest 100.00% [2]
Investor Copel GeT [2]
GE Olho D'agua S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name GE Olho D’Água S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor São Bento
GE Boa Vista S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name GE Boa Vista S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor São Bento
GE Farol S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name GE Farol S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor São Bento
GE Sao Bento do Norte S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name GE São Bento do Norte S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor São Bento
Central Geradora Eolica Sao Bento do Norte I S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Bento do Norte I S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Central Geradora Eolica Sao Bento do Norte II S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Bento do Norte II S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Central Geradora Eolica Sao Bento do Norte III S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Bento do Norte III S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Central Geradora Eolica Sao Miguel I S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Miguel I S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Central Geradora Eolica Sao Miguel II S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Miguel II S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Central Geradora Eolica Sao Miguel III S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Central Geradora Eólica São Miguel III S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Guajiru S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Guajiru S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Jangada S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Jangada S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Potiguar S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Potiguar S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Cutia S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Cutia S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Maria Helena S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Maria Helena S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Esperanca do Nordeste S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Esperança do Nordeste S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
Usina de Energia Eolica Paraiso dos Ventos do Nordeste S.A. [Member]  
Disclosure of subsidiaries [line items]  
Subsidiary name Usina de Energia Eólica Paraíso dos Ventos do Nordeste S.A.
Headquarters São Bento do Norte/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Cutia
[1] The company is studying the possible incorporation of the operational activities and version of Copel RENs equity for the shareholder or the change of main activity.
[2] Pre-operating stage.