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Financial instruments - Sensitivity analysis – foreign exchange rate exposure – derivative financial instruments (Details) - Currency risk [member] - BRL (R$) R$ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2023
Possible 25% |  |
Disclosure of detailed information about financial instruments [line items] |  |
Closing Foreign Exchange Rate, Percentage of increase (decrease) | 25.00% |
Possible 25% | U.S. Dollar to Brazilian Real | Derivative options |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ (6,463,834) |
Possible 25% | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (2,591,116) |
Possible 25% | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (115,804) |
Possible 25% | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (171,652) |
Possible 25% | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (3,485) |
Possible 25% | U.S. Dollar to Euro | NDF parity derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ (3) |
Remote 50% |  |
Disclosure of detailed information about financial instruments [line items] |  |
Closing Foreign Exchange Rate, Percentage of increase (decrease) | 50.00% |
Remote 50% | U.S. Dollar to Brazilian Real | Derivative options |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ (14,873,219) |
Remote 50% | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (5,096,080) |
Remote 50% | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (232,931) |
Remote 50% | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (343,304) |
Remote 50% | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (6,875) |
Remote 50% | U.S. Dollar to Euro | NDF parity derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (6) |
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative options |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | 290,364 |
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (873,359) |
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | 7,419 |
Probable (base value) | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | 94,560 |
Probable (base value) | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (13,465) |
Probable (base value) | U.S. Dollar to Euro | NDF parity derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ (14) |
Selling transactions in the futures markets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Value at Risk Time Horizon | 24 years | 24 years

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