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Risk management (Details 6) - BRL (R$) R$ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Liabilities |  |
Borrowings and financing | R$ 29,485,118 |
Trade payables and contractors | 490,494 |
Services payable | 838,703 | R$ 750,732
Public-Private Partnership - PPP | 8,367,087 |
Program Contract Commitments | 36,940 |
Total | 39,218,342 |
Twenty Twenty Four [Member] |  |
Liabilities |  |
Borrowings and financing | 3,051,567 |
Trade payables and contractors | 490,494 |
Services payable | 838,703 |
Public-Private Partnership - PPP | 432,216 |
Program Contract Commitments | 20,310 |
Total | 4,833,290 |
Twenty Twenty Five [Member] |  |
Liabilities |  |
Borrowings and financing | 3,773,001 |
Trade payables and contractors |  |
Services payable |  |
Public-Private Partnership - PPP | 446,524 |
Program Contract Commitments | 1,232 |
Total | 4,220,757 |
Twenty Twenty Six [Member] |  |
Liabilities |  |
Borrowings and financing | 3,368,294 |
Trade payables and contractors |  |
Services payable |  |
Public-Private Partnership - PPP | 461,438 |
Program Contract Commitments | 1,232 |
Total | 3,830,964 |
Twenty Twenty Seven [Member] |  |
Liabilities |  |
Borrowings and financing | 3,278,126 |
Trade payables and contractors |  |
Services payable |  |
Public-Private Partnership - PPP | 476,850 |
Program Contract Commitments | 1,232 |
Total | 3,756,208 |
Twenty Twenty Eight [Member] |  |
Liabilities |  |
Borrowings and financing | 2,418,568 |
Trade payables and contractors |  |
Services payable |  |
Public-Private Partnership - PPP | 492,777 |
Program Contract Commitments | 1,232 |
Total | 2,912,577 |
Twenty Twenty Nine Onwards [Member] |  |
Liabilities |  |
Borrowings and financing | 13,595,562 |
Trade payables and contractors |  |
Services payable |  |
Public-Private Partnership - PPP | 6,057,282 |
Program Contract Commitments | 11,702 |
Total | R$ 19,664,546 |

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