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Operating Segments (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS R$ 57,384,156 R$ 55,819,074
CURRENT ASSETS 13,041,808 13,715,730
Non-current assets 44,342,348 42,103,344
Long term assets 15,315,121 16,343,437
Noncurrent investment 3,577,937 3,511,797
Property, plant and equipment 8,516,697 10,825,421
Intangible assets other than goodwill 16,623,610 11,170,089
Right of use Asset 308,983 252,600
Elimination of intersegment amounts [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS (1,902,758) (2,997,258)
CURRENT ASSETS (2,975,940) (1,864,481)
Non-current assets 1,073,182 (1,132,777)
Long term assets (380,976) (633,391)
Noncurrent investment 0 0
Property, plant and equipment 0 (577,205)
Intangible assets other than goodwill 1,454,158 99,093
Right of use Asset 0 (21,274)
Electricity GET [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS 29,552,246 26,663,528
CURRENT ASSETS 4,796,497 3,841,190
Non-current assets 24,755,749 22,822,338
Long term assets 7,418,447 6,966,439
Noncurrent investment 3,411,005 3,345,350
Property, plant and equipment 8,428,157 11,060,949
Intangible assets other than goodwill 5,365,916 1,341,216
Right of use Asset 132,224 108,384
Electricity Energy DIS [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS 23,567,303 21,831,127
CURRENT ASSETS 6,769,769 5,153,666
Non-current assets 16,797,534 16,677,461
Long term assets 6,847,655 8,229,821
Noncurrent investment 442 443
Property, plant and equipment 0 0
Intangible assets other than goodwill 9,788,358 8,317,327
Right of use Asset 161,079 129,870
Electricity Energy COM [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS 1,447,083 1,824,990
CURRENT ASSETS 916,049 1,074,359
Non-current assets 531,034 750,631
Long term assets 520,427 740,114
Noncurrent investment 0 0
Property, plant and equipment 702 770
Intangible assets other than goodwill 5,731 5,784
Right of use Asset 4,174 3,963
SER [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS 149,155  
CURRENT ASSETS 48,889  
Non-current assets 100,266  
Long term assets 15,084  
Noncurrent investment 0  
Property, plant and equipment 80,590  
Intangible assets other than goodwill 901  
Right of use Asset 3,691  
GAS [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS   1,023,624
CURRENT ASSETS   240,017
Non-current assets   783,607
Long term assets   73,274
Noncurrent investment   0
Property, plant and equipment   0
Intangible assets other than goodwill   699,697
Right of use Asset   10,636
Holding And Services [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS 4,571,127 6,026,072
CURRENT ASSETS 3,486,544 4,994,382
Non-current assets 1,084,583 1,031,690
Long term assets 894,484 795,749
Noncurrent investment 166,490 166,004
Property, plant and equipment 7,248 52,305
Intangible assets other than goodwill 8,546 7,247
Right of use Asset R$ 7,815 10,385
Reclassifications [Member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
ASSETS   1,446,991
CURRENT ASSETS   276,597
Non-current assets   1,170,394
Long term assets   171,431
Noncurrent investment   0
Property, plant and equipment   288,602
Intangible assets other than goodwill   699,725
Right of use Asset   R$ 10,636