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Financial Instruments (Details 1) - Credit risk [Member] - BRL (R$) R$ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | R$ 12,309,101 | R$ 12,878,485
Cash And Cash Equivalents Financial Asset [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 4,161,939 | 5,634,623
Bonds And Securities One [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 529,708 | 495,495
Pledges And Restricted Deposits Linked [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 9 | 9
Trade Accounts Receivable Financial Assets [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 4,078,882 | 3,866,429
Sectorial Financial Assets [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 0 | 30,946
Accounts Receivable Related To The Concession [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 2,610,731 | 1,954,679
Accounts Receivable Related To The Concession Bonus From The Grant [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 821,804 | 792,741
Accounts Receivable Generation Concessions [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | 75,425 | 71,835
Other Temporary Investments One [Member] |  |
Disclosure of financial assets [line items] |  |
Maximum exposure to credit risk | R$ 30,603 | R$ 31,728

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35K -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2024-03-27 + Details
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