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Contract assets (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Concession Assets [Member] |  |
Statement [Line Items] |  |
Construction income | 1.65% | 1.65%
Operating and maintenance margin | 1.65% | 1.65%
Remuneration rate | 9.62% | 9.60%
Contract correction index | IPCA (b) | IPCA (b)
Annual RAP, according to Homologatory Resolution | R$ 611,620 | R$ 574,028
R B S E Assets Financial [Member] |  |
Statement [Line Items] |  |
Remuneration rate | 8.11% | 8.11%
Contract correction index | IPCA | IPCA
Annual RAP, according to Homologatory Resolution | R$ 209,055 | R$ 201,158
R B S E Assets Economic [Member] |  |
Statement [Line Items] |  |
Remuneration rate | 11.10% | 11.10%
Contract correction index | IPCA | IPCA
Annual RAP, according to Homologatory Resolution | R$ 115,920 | R$ 157,525

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