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Marketable securities (Details) - BRL (R$) R$ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 8,503,950 | R$ 13,363,511
Current | 8,087,850 | 12,971,547
Non-Current | 416,100 | 391,964
Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | 7,388,765 | 13,293,256
Foreign countries |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 1,115,185 | 70,255
Private Funds | CDI |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 99.30% |
Private Funds | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 366,299 | 552,635
Private Securities | CDI/IPCA |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 6.10% |
Private Securities | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 1,260,384 | 1,203,776
Private Securities (CDBs) | CDI |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 101.60% |
Private Securities (CDBs) | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 5,020,743 | 11,144,881
CDBs - Escrow Account | CDI |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 101.76% |
CDBs - Escrow Account | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 416,100 | 391,964
Time Deposits | Foreign countries |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 1,098,578 |
Time Deposits | Foreign countries | Fixed |  |
Disclosure of financial assets [line items] |  |
Average yield p.a. % | 5.02% |
Other | Foreign countries |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 16,607 | R$ 70,255
Other (Restricted financial investment) | CDI |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 99.30% |
Other (Restricted financial investment) | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 23,846 |
Public Securities - Instituto de Crédito Oficial (ICO) | Fixed |  |
Disclosure of financial assets [line items] |  |
Percentage of basis used to calculate interest rate | 12.80% |
Public Securities - Instituto de Crédito Oficial (ICO) | Country of domicile |  |
Disclosure of financial assets [line items] |  |
Marketable Securities | R$ 301,393 |

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