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CONTRACTUAL TRANSMISSION ASSETS - RAP of the Basic Network of the Existing System (RBSE) and the RAP not related to the RBSE (Details) - BRL (R$) R$ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved | R$ 16,982,995 | R$ 16,982,995 | R$ 17,676,724
Eletrobras |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | 6,904,773 | 7,325,387
Chesf |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | 5,208,677 | 5,301,210
Eletronorte |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | 3,000,087 | 3,121,348
CGT Eletrosul |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | 1,764,288 | 1,826,724
Tringulo Mineiro Transmissora S.A. |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | 54,635 | 52,949
Vale do Sao Bartolomeu Transmissora de Energia S.A. |  |  |
Investments in subsidiaries, joint ventures and associates [abstract] |  |  |
Annual permitted revenues approved |  | R$ 50,535 | R$ 49,106

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