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Operating Costs and Expenses (Details 4) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Credit losses, provisions and reversals R$ 345,102    
Restated One [Member]      
Credit losses, provisions and reversals   R$ 92,235 R$ 717,531
Provision for legal claims [Member]      
Credit losses, provisions and reversals 222,251    
Provision for legal claims [Member] | Restated One [Member]      
Credit losses, provisions and reversals   157,668 623,742
Power Generation Concession Contract [Member]      
Credit losses, provisions and reversals (3,590)    
Power Generation Concession Contract [Member] | Restated One [Member]      
Credit losses, provisions and reversals   (3,193) 9,061
Property Plant And Equipment Expense [Member]      
Credit losses, provisions and reversals 27,755    
Property Plant And Equipment Expense [Member] | Restated One [Member]      
Credit losses, provisions and reversals   (174,500) (34,435)
Allowance For Doubtful Accounts Client And Other Credits [Member]      
Credit losses, provisions and reversals 100,730    
Allowance For Doubtful Accounts Client And Other Credits [Member] | Restated One [Member]      
Credit losses, provisions and reversals   109,435 124,068
Tax Credits Estimated Losses [Member]      
Credit losses, provisions and reversals R$ (2,044)    
Tax Credits Estimated Losses [Member] | Restated One [Member]      
Credit losses, provisions and reversals   R$ 2,825 R$ (4,905)