v3.26.1
INFORMATION BY BUSINESS SEGMENT - Segments (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating Segment      
Net operating revenue R$ 41,281,595 R$ 40,181,552 R$ 37,158,908
Operating expenses (35,566,369) (26,702,164) (26,129,636)
Depreciation and amortization (4,576,919) (3,987,774) (3,621,342)
Other expenses¹ 508,613 1,084,750 674,774
Operational provisions (288,120) (386,693) 862,029
Other revenue and expenditure 459,000 136,540 651,280
Regulatory remeasurements - Transmission contracts (4,081,630) 6,129,771 (12,144)
Profit before financial result 2,092,596 19,745,698 11,668,408
FINANCIAL RESULT (10,926,530) (11,628,120) (12,002,121)
Net profit from continuing operations 6,559,657 10,380,754 4,726,875
Net loss from discontinued operations 0 0 (332,014)
NET INCOME FOR THE YEAR 6,559,657 10,380,754 4,394,861
Operating segments      
Operating Segment      
Net operating revenue 41,281,595 40,181,552 37,158,908
Third parties 41,281,595 40,181,553 37,158,908
Operating expenses (35,566,368) (26,702,165) (26,129,636)
Depreciation and amortization (4,576,920) (3,987,774) (3,621,342)
Energy purchased for resale (6,339,557) (5,068,123) (3,028,226)
Charges for using the electricity grid (4,022,746) (3,954,730) (3,482,126)
Construction cost (5,065,204) (4,286,914) (3,291,132)
Other expenses¹ (14,926,204) (9,631,224) (10,930,223)
Operational provisions (635,737) 226,600 (1,776,587)
Other revenue and expenditure 459,000 136,540 651,280
Regulatory remeasurements - Transmission contracts (4,081,630) 6,129,771 (12,144)
Profit before financial result 2,092,597 19,745,698 11,668,408
FINANCIAL RESULT (10,926,529) (11,628,120) (12,002,121)
Results of equity method investments 1,853,984 2,503,205 2,062,090
Current and deferred income tax and social security contributions 13,539,605 (240,030) 2,998,498
Net profit from continuing operations     4,726,875
Net loss from discontinued operations     (332,014)
NET INCOME FOR THE YEAR 6,559,657 10,380,753 4,394,861
Eliminations      
Operating Segment      
Net operating revenue (1,608,143) (736,851) (575,837)
Intersegments (1,608,143) (736,851) (575,837)
Operating expenses 1,608,143 736,851 575,837
Energy purchased for resale 1,100,243 306,356 264,091
Charges for using the electricity grid 486,285 425,935 311,616
Other expenses¹ 21,615 4,560 130
Profit before financial result 0 0 0
Total      
Operating Segment      
Other revenue and expenditure 541,348 337,166 426,427
Other Activities      
Operating Segment      
Other revenue and expenditure 507,298    
Other Activities | Operating segments      
Operating Segment      
Net operating revenue 464,248    
Intersegments 21,615    
Third parties 442,633    
Operating expenses 27,726    
Depreciation and amortization (63,250)    
Energy purchased for resale 0    
Charges for using the electricity grid 0    
Construction cost 0    
Other expenses¹ 76,334    
Operational provisions 14,642    
Other revenue and expenditure 187,598    
Profit before financial result 679,572    
Administration      
Operating Segment      
Other revenue and expenditure   30,292 115,371
Administration | Operating segments      
Operating Segment      
Net operating revenue   29,952 110,270
Third parties   29,952 110,270
Operating expenses   (236,593) (920,109)
Depreciation and amortization   (8,358) (37,213)
Energy purchased for resale   (57) (99)
Charges for using the electricity grid   0 0
Construction cost   0 0
Other expenses¹   (683,937) (2,129,529)
Operational provisions   455,759 1,246,732
Other revenue and expenditure   13,745  
Profit before financial result   (192,896) (809,839)
Generation | Operating segments      
Operating Segment      
Net operating revenue 24,940,431 23,983,323 22,397,652
Intersegments 1,100,243 306,356 264,091
Third parties 23,840,188 23,676,967 22,133,561
Operating expenses (26,805,813) (17,739,190) (17,809,931)
Depreciation and amortization (4,310,179) (3,921,408) (3,476,566)
Energy purchased for resale (7,439,800) (5,374,422) (3,292,218)
Charges for using the electricity grid (4,509,031) (4,380,665) (3,793,742)
Construction cost 0 0 0
Other expenses¹ (10,834,819) (4,725,199) (4,655,208)
Operational provisions 288,016 662,504 (2,592,197)
Other revenue and expenditure 124,162 88,711  
Profit before financial result (1,741,220) 6,332,844 4,587,721
Transmission      
Operating Segment      
Other revenue and expenditure 1,147 241,150 415,326
Transmission | Operating segments      
Operating Segment      
Net operating revenue 17,485,059 16,905,128 15,226,823
Intersegments 486,285 430,495 311,746
Third parties 16,998,774 16,474,634 14,915,077
Operating expenses (10,396,424) (9,463,233) (7,975,433)
Depreciation and amortization (203,491) (58,008) (107,563)
Energy purchased for resale 0 0 0
Charges for using the electricity grid 0 0 0
Construction cost (5,065,204) (4,286,914) (3,291,132)
Other expenses¹ (4,189,334) (4,226,648) (4,145,616)
Operational provisions (938,395) (891,663) (431,122)
Other revenue and expenditure 147,240 34,084  
Regulatory remeasurements - Transmission contracts (4,081,630) 6,129,771 (12,144)
Profit before financial result R$ 3,154,245 R$ 13,605,750 R$ 7,239,246