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42 Condensed individual financial information of Companhia Paranaense de Energia - Copel (Details 8) - Companhia Paranaense de Energia - Copel [member] - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]    
Restricted net assets R$ 18,197,350 R$ 16,120,548
Copel geracao e transmissao s.a. [member]    
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]    
Restricted net assets 10,732,735 9,749,705
Centrais Eletricas Rio Jordao - Elejor [member]    
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]    
Restricted net assets 13,490 42,859
UEG Araucaria Ltda. [member]    
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]    
Restricted net assets 238,211 315,740
Copel Distribuicao S.A. [member]    
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]    
Restricted net assets R$ 7,212,914 R$ 6,012,244