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1 Operations (Details 4)
12 Months Ended
Dec. 31, 2020
Consorcio Energetico Cruzeiro do Sul - Copel GeT [member] | Copel GeT [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Energético Cruzeiro do Sul (Note 17.4)
Consortium members Copel GeT
Interest 51.00%
Consorcio Energetico Cruzeiro do Sul - Copel GeT [member] | Eletrosul Centrais Eletricas S.A. [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Energético Cruzeiro do Sul (Note 17.4)
Consortium members Eletrosul Centrais Elétricas S.A.
Interest 49.00%
Consorcio Empreendedor Baixo Iguacu [member] | Copel GeT [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Empreendedor Baixo Iguaçu (Note 17.4)
Consortium members Copel GeT
Interest 30.00%
Consorcio Empreendedor Baixo Iguacu [member] | Geracao Ceu Azul S.A (subsidiary of Neoenergia S.A.) [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Empreendedor Baixo Iguaçu (Note 17.4)
Consortium members Geração Céu Azul S.A (subsidiary of Neoenergia S.A.)
Interest 70.00%
Consorcio Copel Energia a Gas Natural [member] | Copel [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Copel Energia a Gás Natural
Consortium members Copel
Interest 49.00%
Consorcio Copel Energia a Gas Natural [member] | Shell Brasil Petroleo Ltda. [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Copel Energia a Gás Natural
Consortium members Shell Brasil Petróleo Ltda.
Interest 51.00%
Consorcio Parana IP [member] | Copel [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Paraná IP
Consortium members Copel
Interest 49.00%
Consorcio Parana IP [member] | Consorcio BRC [member]  
Disclosure of joint operations [line items]  
Joint operation name Consórcio Paraná IP
Consortium members Consórcio BRC 
Interest 51.00%