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RECOVERABLE VALUE OF LONG-TERM ASSETS- General (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Impairment provisional balance R$ 1,847,079 R$ 2,689,823  
Minimum      
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Discount rate (as a percent)   6.96%  
Maximum      
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Discount rate (as a percent) 13.56%    
Generation (except Angra 3)      
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Discount rate without the SUDAM/SUDENE tax benefit   4.82%  
Discount rate with the SUDAM/SUDENE tax benefit   5.58%  
Generation      
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Discount rate (as a percent)   5.20%  
Discount rate without the SUDAM/SUDENE tax benefit 5.81%    
Discount rate with the SUDAM/SUDENE tax benefit 6.53%    
Impairment provisional balance R$ 1,776,648 R$ 2,620,752 R$ 6,964,625
Generation | UTE Candiota      
RECOVERABLE VALUE OF LONG-TERM ASSETS      
Impairment provisional balance   R$ 1,043,193