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Trade Accounts Receivable (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable R$ 3,866,429 R$ 3,451,869
Current 3,761,170 3,342,050
Noncurrent 105,259 109,819
Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 3,282,379  
Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 462,649  
Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 121,401  
Electricity Sales To Final Customers And Charges For Use Of The System Copel D I S [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 2,981,740 2,513,664
Electricity Sales To Final Customers And Charges For Use Of The System Copel D I S [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 2,428,632  
Electricity Sales To Final Customers And Charges For Use Of The System Copel D I S [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 395,161  
Electricity Sales To Final Customers And Charges For Use Of The System Copel D I S [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 157,947  
Electricity Sales To Final Customers [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 217,801 208,631
Electricity Sales To Final Customers [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 207,084  
Electricity Sales To Final Customers [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 4,414  
Electricity Sales To Final Customers [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 6,303  
Other Consumers Receivables [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 202,315 111,436
Other Consumers Receivables [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 90,694  
Other Consumers Receivables [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 71,771  
Other Consumers Receivables [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 39,850  
Energy Supply Concessionaires And Permission Holder And Trading Companies [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 471,087 483,218
Energy Supply Concessionaires And Permission Holder And Trading Companies [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 437,348  
Energy Supply Concessionaires And Permission Holder And Trading Companies [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 24,184  
Energy Supply Concessionaires And Permission Holder And Trading Companies [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 9,555  
C C E E [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 189,713 196,627
C C E E [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 70,048  
C C E E [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable  
C C E E [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 119,665  
Charges For Use Of The Transmission System [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 86,155 71,466
Charges For Use Of The Transmission System [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 68,161  
Charges For Use Of The Transmission System [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 7,314  
Charges For Use Of The Transmission System [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 10,680  
Gas distribution [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable 138,770
Gas distribution [member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable  
Gas distribution [member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable  
Gas distribution [member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable  
Expected Credit Losses [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable (282,382) R$ (271,943)
Expected Credit Losses [Member] | Balance Falling Due [Member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable (19,588)  
Expected Credit Losses [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable (40,195)  
Expected Credit Losses [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade Accounts Receivable R$ (222,599)