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Sale Of Assets - Additional Information (Details) R$ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 13, 2024 BRL (R$) | Mar. 17, 2023 Number | Dec. 31, 2024 BRL (R$) Number | Dec. 31, 2023 BRL (R$) | Dec. 31, 2022 BRL (R$) | Mar. 27, 2024 | Feb. 29, 2024 BRL (R$)
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Dividends received |  |  | R$ 349 | R$ 592 | R$ 708 |  |
Current subsidy receivable |  |  | R$ 208 | R$ 196 |  |  | R$ 101
Number of hydroelectric generation plants and units | Number |  | 15 | 15 |  |  |  |
Alianca Energia SA [Member] |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  | 45.00% |
Cemiggt [Member] |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Number of hydroelectric generation plants and units | Number |  | 12 |  |  |  |  |
Cemiggt [Member] | Alianca Energia SA [Member] |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Total Considerations |  |  | R$ 2,737 |  |  |  |
Horizontes [Member] |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Number of hydroelectric generation plants and units | Number |  | 3 |  |  |  |  |
Alianca Geracao [Member] | Cemiggt [Member] |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |
Total Considerations | R$ 2,737 |  |  |  |  |  |
Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities | 2,700 |  |  |  |  |  |
Dividends received | R$ 299 |  |  |  |  |  |
Amount of compensation |  |  | R$ 223 |  |  |  |
Percentage of future compensation |  |  | 45.00% |  |  |  |
Expenses incurred for sale of asset |  |  | R$ 2 |  |  |  |

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