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Trade Accounts Receivable (Details 2) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   R$ 271,943
Expected credit losses at beginning of period R$ 282,382  
Additions/ (Reversals) 100,025 107,296
Write offs (134,183) (86,519)
Reclassification (7,510) (10,338)
Expected credit losses at end of period 240,714 282,382
Electricity Sales To Final Customers And Charges For Use Of The System Copel D I S [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   119,538
Expected credit losses at beginning of period 133,867  
Additions/ (Reversals) 70,627 99,685
Write offs (120,871) (85,356)
Reclassification 0
Expected credit losses at end of period 83,623 133,867
Residential Accounts Receivable [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   12,532
Expected credit losses at beginning of period 15,324  
Additions/ (Reversals) 716 2,792
Write offs (9,175)
Reclassification 0 0
Expected credit losses at end of period 6,865 15,324
Industrial Accounts Receivable [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   9,827
Expected credit losses at beginning of period 13,526  
Additions/ (Reversals) 21,172 4,533
Write offs (4,137) (834)
Reclassification 0 0
Expected credit losses at end of period 30,561 13,526
C C E E [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   119,665
Expected credit losses at beginning of period 119,665  
Additions/ (Reversals) 0 0
Write offs 0 0
Reclassification 0 0
Expected credit losses at end of period 119,665 119,665
Gas distribution [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Allowance account for credit losses of financial assets at beginning of period   10,381
Expected credit losses at beginning of period 0  
Additions/ (Reversals) 7,510 286
Write offs 0 (329)
Reclassification (7,510) (10,338)
Expected credit losses at end of period R$ 0 R$ 0