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42 Condensed individual financial information of Companhia Paranaense de Energia - Copel (Details 2) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]      
NET INCOME R$ 3,909,750    
Gain (losses) on actuarial liabilities      
Post employment benefits (271,345)    
Taxes on other comprehensive income 92,190    
Items that are or maybe reclassified to profit or loss      
Total comprehensive income, net of taxes (179,155)    
TOTAL COMPREHENSIVE INCOME 3,730,595 R$ 1,939,685 R$ 1,405,644
Restated [Member]      
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]      
NET INCOME   2,062,869 1,444,004
Gain (losses) on actuarial liabilities      
Post employment benefits   (186,628) (58,354)
Taxes on other comprehensive income   63,444 19,994
Items that are or maybe reclassified to profit or loss      
Total comprehensive income, net of taxes   (123,184) (38,360)
TOTAL COMPREHENSIVE INCOME   1,939,685 1,405,644
Companhia Paranaense de Energia - Copel [member]      
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]      
NET INCOME 3,904,202    
Gain (losses) on actuarial liabilities      
Post employment benefits (779)    
Post employment benefits - equity (178,434)    
Taxes on other comprehensive income 265    
Items that are or maybe reclassified to profit or loss      
Total comprehensive income, net of taxes (178,948)    
TOTAL COMPREHENSIVE INCOME R$ 3,725,254    
Companhia Paranaense de Energia - Copel [member] | Restated [Member]      
CondensedUnconsolidatedFinancialInformationOfCompanhiaParanaenseDeEnergiaCopelLineItems [Line Items]      
NET INCOME   1,989,946 1,407,063
Gain (losses) on actuarial liabilities      
Post employment benefits   (3,371) (408)
Post employment benefits - equity   (120,358) (38,245)
Taxes on other comprehensive income   1,146 139
Items that are or maybe reclassified to profit or loss      
Subsidiary loss with interest variation   (4,874)  
Total comprehensive income, net of taxes   (127,457) (38,514)
TOTAL COMPREHENSIVE INCOME   R$ 1,862,489 R$ 1,368,549