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Operating Costs and Expenses (Details 6) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | R$ 240,842 | R$ 430,544 | R$ 489,318
Financial Offset For The Use Of Water Resources [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 173,318 | 152,604 | 142,270
Insurance [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 41,111 | 48,914 | 41,505
Advertising and publicity [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 34,546 | 31,254 | 28,909
Collection Charge [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 33,831 | 43,022 | 47,923
Compensation [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 30,435 | 21,699 | 14,703
Leasing And Rent [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 28,045 | 30,528 | 33,316
Taxes [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 23,358 | 23,463 | 59,188
Aneel Inspection Fee [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 19,458 | 18,248 | 15,683
Donations Contributions Grants Tax Incentives [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 4,434 | 8,808 | 6,521
Fair Value Of Power Generation Concession Assets [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | 0 | 0 | 26,451
Net Losses In The Decommissioning And Disposal Of Assets [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | (225,683) | 45,596 | 35,483
Other Net Income Costs And Expenses [Member] |  |  |
Operating costs and expenses [Line Items] |  |  |
Other gains (losses) | R$ 77,989 | R$ 6,408 | R$ 37,366

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- Definition The gains (losses) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_102&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_103&doctype=Standard -URIDate 2024-03-27 + Details
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