v3.26.1
BASIS OF PREPARATION AND PRESENTATION OF FINANCIAL STATEMENTS - Subsidiaries (Details)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent)   100.00%
Consórcio Energético Cruzeiro do Sul⁴    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent)   49.00%
Consórcio UHE Baguari    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
AXIA Energia Nordeste    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Nova Era Solar Enki S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 99.99% 99.97%
AXIA Energia Norte    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Nova Era Catarina Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Nova Era Ceará Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Nova Era Integração Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Nova Era Teresina Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Teles Pires Participações S.A.¹    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Companhia Hidrelétrica Teles Pires S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
AXIA Energia Sul    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
AXIA Energia Transmissora Carnaúba S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
AXIA Energia Transmissora Nova Ponte S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
AXIA Energia Transmissora Paracatu S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
AXIA Energia Transmissora Seridó S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
Eólica Ibirapuitã S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
Baguari Energia S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Baguari I Geração de Energia S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Brasil Ventos Energia S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Energia dos Ventos V S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Energia dos Ventos VI S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00%  
Energia dos Ventos VII S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Energia dos Ventos VIII S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Energia dos Ventos IX S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 100.00% 100.00%
Itaguaçu da Bahia Energias Renováveis S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 98.00% 98.00%
Eletrobras Participações S.A. – Eletropar²    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation   83.71%
Eletronet S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00%  
Madeira Energia S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 99.74% 99.74%
Santo Antônio    
FINANCIAL ASSETS AND LIABILITIES    
Indirect ownership (as a percent) 99.74% 99.74%
SPE Nova Era Janapu Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Triângulo Mineiro Transmissora S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%
Vale do São Bartolomeu Transmissora de Energia S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 90.00%
Retiro Baixo Energética S.A.    
FINANCIAL ASSETS AND LIABILITIES    
Percentage of equity interest /Percentage of participation 100.00% 100.00%