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Operating Costs and Expenses (Details 6) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net R$ 430,544 R$ 489,318 R$ 356,291
Financial Offset For The Use Of Water Resources [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 152,604 142,270 85,545
Collection Charge [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 43,022 47,923 50,371
Net Losses In The Decommissioning And Disposal Of Assets [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 45,596 35,483 (74)
Leasing And Rent [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 30,528 33,316 19,933
Insurance [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 48,914 41,505 32,866
Taxes [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 23,463 59,188 41,268
Fair Value Of Power Generation Concession Assets [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 26,451
Aneel Inspection Fee [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 18,248 15,683 15,303
Compensation [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 21,699 14,703 48,679
Donations Contributions Grants Tax Incentives [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 8,808 6,521 37,867
Associacao Das Emissoras De Radiodifusao Do Parana AERP [member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 12,727 11,789 11,400
Publicity [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 9,772 9,835 10,918
Sponsorship [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 3,530 2,620 897
Talento Olimpico Paranaense TOP [member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net 5,225 4,665 4,750
Other Net Income Costs And Expenses [Member]      
IfrsStatementLineItems [Line Items]      
Other operating costs and expenses, net R$ 6,408 R$ 37,366 R$ (3,432)