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RESTRICTED CASH (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Restricted Cash:    
Current R$ 508,734 R$ 447,688
Non-current 3,170,749 1,985,656
Total R$ 3,679,483 2,433,344
Furnas    
Restricted Cash:    
Maximum percentage of equity in SPEs that will be held 49.00%  
Chesf    
Restricted Cash:    
Maximum percentage of equity in SPEs that will be held 49.00%  
Itaipu Agreement    
Restricted Cash:    
Current R$ 286,601 197,628
RGR resources    
Restricted Cash:    
Current 40,960 38,177
Escrow account - compulsory loan    
Restricted Cash:    
Current 70,112 199,820
PROCEL    
Restricted Cash:    
Current 3,746 3,491
Commercialization - PROINFA    
Restricted Cash:    
Current   8,572
Others    
Restricted Cash:    
Current 75,347  
Non-current 130,026 47,813
Fundo de Energia do Sudeste e Centro-Oeste - FESC    
Restricted Cash:    
Non-current 1,430,650 1,245,994
Fundo de Energia do Nordeste - FEN    
Restricted Cash:    
Non-current 829,410 R$ 691,849
Loan and financing reserve - MESA    
Restricted Cash:    
Non-current 563,708  
Loan and financing reserve - CGT Eletrosul    
Restricted Cash:    
Non-current 121,233  
Loan and financing reserve - CHESF    
Restricted Cash:    
Current 31,968  
Non-current R$ 95,722