v3.26.1
ASSETS AND LIABILITIES HELD FOR SALE - Additional Information (Details) - BRL (R$)
R$ in Thousands
1 Months Ended 7 Months Ended
Oct. 31, 2025
Sep. 30, 2025
May 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Assets and liabilities classified as held for sale [line items]          
Financial compensation for transfer of minority interest     R$ 196,609    
Liabilities associated with assets held for sale       R$ 0 R$ 194,454
Empresa Metropolitana de Águas e Energia S.A. - EMAE          
Assets and liabilities classified as held for sale [line items]          
Gains (losses) on disposals of investments   R$ 24,524      
Empresa Metropolitana de Águas e Energia S.A. - EMAE | PREFERRED          
Assets and liabilities classified as held for sale [line items]          
Decrease through classified as held for sale, investments   R$ 476,461      
Thermal projects          
Assets and liabilities classified as held for sale [line items]          
Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations     2,394,259    
Disposal group, including discontinued operation, expenses     269,783    
Contingent earn out asset     1,200,000    
Assets and liabilities classified as held for sale | Eletronuclear          
Assets and liabilities classified as held for sale [line items]          
Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations R$ 535,000        
Impairment of asset held for sale R$ 7,289,762        
Liabilities associated with assets held for sale       2,400,000  
UHE Colíder - AXIA Energia          
Assets and liabilities classified as held for sale [line items]          
Profit/Loss since acquisition date       R$ 45,098  
Gains (losses) on disposals of investments     R$ 157,840    
Consórcio Energético Cruzeiro do Sul          
Assets and liabilities classified as held for sale [line items]          
Transfer of minority interest     49.00%    
Mata de Santa Genebra Transmissão S.A.          
Assets and liabilities classified as held for sale [line items]          
Transfer of minority interest     49.90%