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Operating Costs and Expenses (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | R$ 8,924,895 | R$ 7,716,190 | R$ 8,096,910
Purchase Of Energy In The Regulated Environment [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 4,009,747 | 3,658,852 | 3,538,507
Itaipu Binacional [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 950,389 | 980,302 | 1,460,955
Electric Energy Trade Chamber [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 832,656 | 431,303 | 370,207
Bilateral Contracts [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 1,849,268 | 1,998,640 | 2,609,713
Program For Incentive To Alternative Energy Sources Proinfa [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 337,978 | 370,495 | 437,461
Micro And Mini Generators And Repurchase Of Customers [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 1,726,602 | 1,125,857 | 675,804
Fair Value In The Purchase And Sale Of Power [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | 36,604 | 0 | 0
PIS Pasep Cofins Taxes On Electricity Purchased For Resale [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Electricity purchased for resale | R$ (818,349) | R$ (849,259) | R$ (995,737)

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