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Contract assets (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Concession Assets [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Construction income | 1.65% | 1.65%
Operating and maintenance margin | 1.65% | 1.65%
Remuneration rate | 9.60% | 9.58%
Contract correction index | IPCA | IPCA
Annual RAP, according to Homologatory Resolution | R$ 574,028 | R$ 523,713
R B S E Assets Financial [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Remuneration rate | 8.11% | 8.11%
Contract correction index | IPCA | IPCA
Annual RAP, according to Homologatory Resolution | R$ 201,158 | R$ 91,276
R B S E Assets Economic [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Remuneration rate | 11.10% | 11.10%
Contract correction index | IPCA | IPCA
Annual RAP, according to Homologatory Resolution | R$ 157,525 | R$ 151,560

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