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v3.25.1

Operating Costs and Expenses (Details 3) - 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] |  |  |
Third-party services expense | R$ 1,074,308 | R$ 996,312 | R$ 754,551
Maintenance Of Electrical System [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 472,011 | 430,954 | 311,553
Maintenance Of Facilities [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 139,924 | 117,981 | 89,741
Communication Processing And Transmission Of Data [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 119,281 | 107,818 | 91,101
Consumer Service [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 104,700 | 100,574 | 83,203
Consulting And Audit [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 77,333 | 81,904 | 49,882
Meter Reading And Bill Delivery [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | 60,308 | 58,734 | 53,660
Other Services [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Third-party services expense | R$ 100,751 | R$ 98,347 | R$ 75,411

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