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Net Operating Revenue (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | R$ 31,974,106 | R$ 29,647,019 | R$ 30,385,041
(-) Pis/Pasep and Cofins | (2,577,655) | (2,477,418) | (2,516,317)
(-) ICMS (VAT) | (3,491,400) | (2,733,900) | (3,657,564)
(-) Service tax (ISSQN) | (3,644) | (4,087) | (6,351)
(-) Sectorial charges | (3,250,371) | (2,952,146) | (3,669,468)
Net Revenue | 22,651,036 | 21,479,468 | 20,535,341
Electricity Sales To Final Customers [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 11,383,852 | 10,384,872 | 11,392,957
(-) Pis/Pasep and Cofins | (923,534) |  |
(-) ICMS (VAT) | (1,400,957) |  |
(-) Service tax (ISSQN) | 0 |  |
Net Revenue | 8,454,990 | 7,946,168 | 7,510,037
Amount of unbilled revenue | 80,296 |  |
Consumers Power Distribution [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 7,981,076 | 6,779,582 | 7,962,325
Free Consumers [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 2,246,579 | 2,723,661 | 2,692,303
Donations And Grants [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 1,156,197 | 881,629 | 738,329
Electricity Sales To Distributors [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 3,674,579 | 4,235,612 | 4,534,515
(-) Pis/Pasep and Cofins | (476,396) |  |
(-) ICMS (VAT) | (17,461) |  |
(-) Service tax (ISSQN) | 0 |  |
Net Revenue | 3,120,628 | 3,602,788 | 3,814,409
Bilateral Contracts [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 1,960,568 | 2,112,486 | 2,923,509
Regulated Contracts [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 1,193,511 | 1,582,836 | 1,033,405
Electric Energy Trade Chamber CCEE [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 399,700 | 425,920 | 459,162
Effective Interest Grant Bonus [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 120,800 | 114,370 | 118,439
Use Of The Main Distribution And Transmission Grid [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 12,737,940 | 10,930,593 | 9,843,657
(-) Pis/Pasep and Cofins | (1,031,028) |  |
(-) ICMS (VAT) | (2,072,970) |  |
(-) Service tax (ISSQN) | 0 |  |
Net Revenue | 7,048,036 | 6,002,192 | 4,828,841
Consumers [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 11,831,389 | 10,058,379 | 8,936,568
Concessionaires And Generators One [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 128,756 | 106,564 | 86,160
Operating And Maintenance Income O And M And Interest Income One [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 777,795 | 765,650 | 820,929
Construction Income [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 2,550,809 | 2,333,787 | 2,164,134
(-) Pis/Pasep and Cofins | 0 |  |
(-) ICMS (VAT) | 0 |  |
(-) Service tax (ISSQN) | 0 |  |
Net Revenue | 2,550,809 | 2,333,787 | 2,164,134
Power Distribution Service Concession [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 2,427,296 | 2,234,542 | 2,048,022
Power Transmission Concession [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 123,513 | 99,245 | 116,112
Fair Value Of Assets From The Indemnity For The Concession [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 82,424 | 62,167 | 79,169
(-) Pis/Pasep and Cofins | 0 |  |
(-) ICMS (VAT) | 0 |  |
(-) Service tax (ISSQN) | 0 |  |
Net Revenue | 82,424 | 62,167 | 79,169
Sectorial Financial Assets And Liabilities Result 1 [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 923,724 | 1,070,196 | 1,847,863
Other Operating Revenue One [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 620,778 | 629,792 | 522,746
Leasing And Rent [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 546,507 | 464,184 | 374,801
Fair Value In The Purchase And Sale Of Power [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 0 | 5,045 | 32,747
Income From Rendering Of Services [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | 38,238 | 41,891 | 59,048
Other Income One [Member] |  |  |
Net Operating Revenue [Line Items] |  |  |
Gross operating revenues | R$ 36,033 | R$ 118,672 | R$ 56,150

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