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Revenue - Schedule of Transmission Concession Contract (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Revenue      
Construction and upgrades Revenue R$ 425 [1] R$ 242 R$ 407
Construction and upgrades costs (290) (172) (291)
Margin R$ 135 R$ 70 R$ 116
Mark-up (%) 46.55% 40.70% 39.86%
Operation and maintenance Revenue R$ 383 R$ 373 R$ 413
Operation and maintenance cost (298) (292) (287)
Margin R$ 85 R$ 81 R$ 126
Mark-up (%) 28.52% 27.74% 43.90%
[1]

This breakdown does not include the financial “Interest revenue arising from the financing component in the transmission contract asset” – which is also part of the concession’s transmission revenue.