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1. Operations (Details) - Subsidiary	12 Months Ended
	Dec. 31, 2018
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
Subsidiary name	Copel Distribuição S.A. (Copel DIS)
Headquarters	Curitiba/PR
Main activity	Distribution and marketing of electricity
Interest	100.00%
Investor	Copel
Subsidiary name	Copel Telecomunicações S.A. (Copel TEL)
Headquarters	Curitiba/PR
Main activity	Telecommunication and communication
Interest	100.00%
Investor	Copel
Subsidiary name	Copel Renováveis S.A. (Copel REN) (a)
Headquarters	Curitiba/PR
Main activity	Control and management of interests
Interest	100.00%
Investor	Copel
Subsidiary name	Copel Comercialização S.A. (Copel Energia)
Headquarters	Curitiba/PR
Main activity	Commercialization of electricity
Interest	100.00%
Investor	Copel
Subsidiary name	Companhia Paranaense de Gás - Compagás
Headquarters	Curitiba/PR
Main activity	Distribution of pipeline gas
Interest	51.00%
Investor	Copel
Subsidiary name	Elejor - Centrais Elétricas do Rio Jordão S.A.
Headquarters	Curitiba/PR
Main activity	Production of electricity
Interest	70.00%
Investor	Copel
Subsidiary name	UEG Araucária Ltda. (UEG)
Headquarters	Curitiba/PR
Main activity	Production of electricity from natural gas
Interest	20.00%
Investor	Copel
Subsidiary name	UEG Araucária Ltda. (UEG)
Headquarters	Curitiba/PR
Main activity	Production of electricity from natural gas
Interest	60.00%
Investor	Copel GeT
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
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
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
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
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
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
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
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
Subsidiary name	Cutia Empreendimentos Eólicos S.A. (Cutia)
Headquarters	Curitiba/PR
Main activity	Control and management of interests
Interest	100.00%
Investor	Copel GeT
Subsidiary name	Costa Oeste Transmissora de Energia S.A. (1.2)
Headquarters	Curitiba/PR
Main activity	Transmission of electricity
Interest	100.00%
Investor	Copel GeT
Subsidiary name	Marumbi Transmissora de Energia S.A. (1.2)
Headquarters	Curitiba/PR
Main activity	Transmission of electricity
Interest	100.00%
Investor	Copel GeT
Subsidiary name	Bela Vista Geração de Energia S.A. (b)
Headquarters	Curitiba/PR
Main activity	Production of electricity
Interest	99.90%
Investor	Copel GeT
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
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
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
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
Subsidiary name	Central Geradora Eólica São Bento do Norte I S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Central Geradora Eólica São Bento do Norte II S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Central Geradora Eólica São Bento do Norte III S.A. (b)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Central Geradora Eólica São Miguel I S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Central Geradora Eólica São Miguel II S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Central Geradora Eólica São Miguel III S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Guajiru S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Jangada S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Potiguar S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Cutia S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Maria Helena S.A. (c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Esperança do Nordeste S.A.(c)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia
Subsidiary name	Usina de Energia Eólica Paraíso dos Ventos do Nordeste S.A. (b)
Headquarters	São Bento do Norte/RN
Main activity	Production of electricity from wind sources
Interest	100.00%
Investor	Cutia

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