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Schedule of subsidiaries (Details)
 12 Months Ended
Dec. 31, 2021
Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [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 
CCEE liabilities  
IfrsStatementLineItems [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]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Copel Telecomunicações S.A. (Copel TEL) - Note 41
Headquarters Curitiba/PR
Main activity Telecommunication and communication 
Interest 100.00%
Investor  Copel 
Copel Servicos S A Copel S E R [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Copel Serviços S.A. (Copel SER)
Headquarters Curitiba/PR
Main activity Production of electricity 
Interest 100.00%
Investor  Copel 
Copel Comercializacao S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Copel Comercialização S.A. (Copel COM)
Headquarters Curitiba/PR
Main activity Commercialization of electricity
Interest 100.00%
Investor  Copel 
Companhia Paranaensede Gas Compagas [Member]  
IfrsStatementLineItems [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 Eletricasdo Rio Jordao S A [Member]  
IfrsStatementLineItems [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 
U E G Araucaria Ltda [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name UEG Araucária S.A. (UEGA)
Headquarters Curitiba/PR
Main activity Production of electricity from natural gas
Interest 20.30%
Investor  Copel 
U E G Araucaria Ltda One [Member]  
IfrsStatementLineItems [Line Items]  
Interest 60.90%
Investor  Copel GeT 
Sao Bento Energia Investimentose Participacoes S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name São Bento Energia, Investimentos e
Participacoes S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name  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]  
IfrsStatementLineItems [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 I I Energias Renovaveis S A [Member]  
IfrsStatementLineItems [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 I I I Energias Renovaveis S A [Member]  
IfrsStatementLineItems [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 I V Energias Renovaveis S A [Member]  
IfrsStatementLineItems [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]  
IfrsStatementLineItems [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]  
IfrsStatementLineItems [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 
Ventosde Santo Uriel S A [Member]  
IfrsStatementLineItems [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]  
IfrsStatementLineItems [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 
Brownfield Investment Holding L Itda One [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Brownfield Investment Holding Lltda. (Brownfield) - Note 1.2
Headquarters Curitiba/PR
Main activity Control and management of interests
Interest 100.00%
Investor  Copel GeT 
Ventos D E Serra Do Mel B S A One [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Ventos de Serra do Mel B S.A.  - Note 1.2
Headquarters Serra do Mel/RN
Main activity Control and management of interests
Interest 68.84%
Investor  Copel GeT 
Ventos D E Serra Do Mel B S A 1 [Member]  
IfrsStatementLineItems [Line Items]  
Interest 31.16%
Investor  Brownfield 
Costa Oeste Transmissorade Energia S A [Member]  
IfrsStatementLineItems [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 Transmissorade Energia S A [Member]  
IfrsStatementLineItems [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]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Uirapuru Transmissora de Energia S.A  
Headquarters Curitiba/PR
Main activity Transmission of electricity
Interest 100.00%
Investor Copel GeT
Bela Vista Geracaode Energia S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Bela Vista Geração de Energia S.A.
Headquarters Curitiba/PR
Main activity Production of electricity
Interest 100.00%
Investor Copel GeT
F D A Geracao De Energia Eletrica S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name F.D.A. Geração de Energia Elétrica S.A. (FDA)
Headquarters Curitiba/PR
Main activity Production of electricity
Interest 100.00%
Investor Copel GeT
Jandaira I Energias Renovaveis S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Jandaíra I Energias Renováveis S.A. (a) (b)
Headquarters Curitiba/PR
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Jandaira I I Energias Renovaveis S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Jandaíra II Energias Renováveis S.A. (a) (b)
Headquarters Curitiba/PR
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Jandaira I I I Energias Renovaveis S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Jandaíra III Energias Renováveis S.A. (a) (b)
Headquarters Curitiba/PR
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Jandaira I V Energias Renovaveis S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Jandaíra IV Energias Renováveis S.A. (a) (b)
Headquarters Curitiba/PR
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
Eol Potiguar B 61 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Eol Potiguar B61 SPE S.A. (c) - Note 1.2
Headquarters Serra do Mel/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor Copel GeT
G E Olho Dagua S A [Member]  
IfrsStatementLineItems [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 
G E Boa Vista S A [Member]  
IfrsStatementLineItems [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 
G E Farol S A [Member]  
IfrsStatementLineItems [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 
E Sao Bentodo Norte S A [Member]  
IfrsStatementLineItems [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 Bentodo Norte I S A [Member]  
IfrsStatementLineItems [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 Bentodo Norte I I S A [Member]  
IfrsStatementLineItems [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 Bentodo Norte I I I S A [Member]  
IfrsStatementLineItems [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
Investor  Cutia 
Ventos D E Serra Do Mel B S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Ventos de Serra do Mel B S.A. 
Interest 100.00%
Central Geradora Eolica Sao Miguel I S A [Member]  
IfrsStatementLineItems [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 I I S A [Member]  
IfrsStatementLineItems [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 I I I S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Guajiru S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Jangada S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Potiguar S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Cutia S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Maria Helena S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Esperancado Nordeste S A [Member]  
IfrsStatementLineItems [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 
Usinade Energia Eolica Paraisodos Ventosdo Nordeste S A [Member]  
IfrsStatementLineItems [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 
Eol potiguar B141SPESA [member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Eol Potiguar B141 SPE S.A. - Note 1.2
Headquarters Serra do Mel/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor  Serra do Mel 
Eol Potiguar B 142 S P E S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Eol Potiguar B142 SPE S.A. - Note 1.2
Headquarters Serra do Mel/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor  Serra do Mel 
Eol Potiguar B 143 S P E S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Eol Potiguar B143 SPE S.A. - Note 1.2
Headquarters Serra do Mel/RN
Main activity Production of electricity from wind sources
Interest 100.00%
Investor  Serra do Mel 
Eol Ventosde Vila Paraiba I V S P E S A [Member]  
IfrsStatementLineItems [Line Items]  
Subsidiary name Eol Ventos de Vila Paraíba IV SPE S.A. - Note 1.2
Main activity Production of electricity from wind sources
Eol Ventosde Vila Paraiba I V S P E S A Two [Member]  
IfrsStatementLineItems [Line Items]  
Headquarters Serra do Mel/RN
Interest 100.00%
Investor  Serra do Mel