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Contract assets (Details 3) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of fair value measurement of assets [line items] |  |
Contract assets, beginning | R$ 7,605,061 |
Contract assets, ending | 7,210,906 | R$ 7,605,061
Transmission Service Concession Contract [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Contract assets, beginning | 5,403,103 | 5,310,476
Realization of gains/losses in business combinations | 722 | 722
Transfers to electricity grid use charges - customers | (815,428) | (718,826)
Transfers to property, plant and equipment | (5,185) | (4,086)
Transfers from litigations | (2,994) | (458)
Auditor's remuneration | 805,727 | 716,030
Construction revenue | 95,610 | 85,181
Construction income | 2,040 | 1,410
Gain from inefficiency | 25,863 | 12,654
Contract assets, ending | 5,509,458 | 5,403,103
Concession Assets [Member] | Transmission Service Concession Contract [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Contract assets, beginning | 4,087,156 | 3,894,276
Realization of gains/losses in business combinations | 722 | 722
Transfers to electricity grid use charges - customers | (508,832) | (423,851)
Transfers to property, plant and equipment | (5,185) | (4,086)
Transfers from litigations | (2,994) | (458)
Auditor's remuneration | 617,622 | 521,308
Construction revenue | 95,610 | 85,181
Construction income | 2,040 | 1,410
Gain from inefficiency | 25,863 | 12,654
Contract assets, ending | 4,312,002 | 4,087,156
R B S E Assets [Member] | Transmission Service Concession Contract [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Contract assets, beginning | 1,315,947 | 1,416,200
Realization of gains/losses in business combinations | 0 | 0
Transfers to electricity grid use charges - customers | (306,596) | (294,975)
Transfers to property, plant and equipment | 0 | 0
Transfers from litigations | 0 | 0
Auditor's remuneration | 188,105 | 194,722
Construction revenue | 0 | 0
Construction income | 0 | 0
Gain from inefficiency | 0 | 0
Contract assets, ending | R$ 1,197,456 | R$ 1,315,947

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- Definition The amount of fees paid or payable to the entity's auditors. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_105&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 116 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard -URIDate 2024-03-27 + Details
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