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Financial instruments - Sensitivity analysis – foreign exchange rate exposure – derivative financial instruments (Details) - Currency risk [member] - BRL (R$) R$ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 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$ (8,199,971) |
Possible 25% | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (2,500,027) |
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 | (255,861) |
Possible 25% | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (178,519) |
Possible 25% | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ 7,337 |
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$ (17,829,451) |
Remote 50% | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (4,807,341) |
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 | (511,664) |
Remote 50% | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (357,039) |
Remote 50% | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | 14,676 |
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative options |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (1,518,526) |
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative swaps |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (1,449,747) |
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 | (36,977) |
Probable (base value) | U.S. Dollar to Brazilian Real | Embedded derivative |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | (23,225) |
Probable (base value) | U.S. Dollar to Brazilian Real | Commodity Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Derivative financial assets | R$ 29,357 |
Selling transactions in the futures markets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Value at Risk Time Horizon |  | 24 years

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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