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Revenue - Schedule of Transmission Concession Contract (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenue [abstract]      
Construction and upgrades revenue R$ 242 R$ 407 R$ 252
Construction and upgrades costs (172) (291) (183)
Margin R$ 70 R$ 116 R$ 69
Mark-up (%) 40.70% 39.86% 37.40%
Operation and maintenance revenue R$ 373 R$ 413 R$ 355
Operation and maintenance cost (292) (287) (235)
Margin R$ 81 R$ 126 R$ 120
Mark-up (%) 27.74% 43.90% 50.88%