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Debentures (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]      
Debentures R$ 12,627,365 R$ 9,619,106 R$ 7,803,855
Gross debt 12,773,954 9,738,006  
Transaction cost (146,589) (118,900)  
Net debt 4,618,794 5,343,217  
Notes and debentures issued 12,627,365 9,619,106  
Debentures, current 2,025,110 1,225,649  
Debentures, noncurent 10,602,255 8,393,457  
Copel Ge T [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 4,982,090 3,807,334  
Copel D I S [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 7,209,707 5,380,227  
Debentures 5th Issue [Member] | Copel Ge T [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 82,619 157,327  
Debentures 5th Issue [Member] | Copel D I S [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 678,738 647,092  
Debentures 6th Issue [Member] | Copel Ge T [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 276,193 687,405  
Debentures 6th Issue [Member] | Copel D I S [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,620,153 1,590,262  
Debentures 7th Issue [Member] | Copel Ge T [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,598,771 1,579,711  
Debentures 7th Issue [Member] | Copel D I S [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,397,531 1,535,469  
Debentures 8th Issue [Member] | Copel Ge T [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,386,822 1,382,891  
Debentures 8th Issue [Member] | Copel D I S [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,206,459 1,607,404  
Debentures 9th Issue | Copel Ge T [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 1,637,685 0  
Debentures 9th Issue | Copel D I S [Member] | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 2,306,826 0  
Debentures 1st Issue [Member] | Copel Servicos | Personal guarantee [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 71,247 0  
Debentures 1st Issue [Member] | Cutia [Member] | Real and personal guarantee and pledge of Copel GeT shares [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures 327,685 349,555  
Debentures 2nd Issue [Member] | Complexo Brisa [Member] | Real and personal guarantee and pledge of Copel GeT shares [Member]      
Disclosure of detailed information about borrowings [line items]      
Debentures R$ 183,225 R$ 200,890