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Cash and cash equivalents (Details) - BRL (R$) R$ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and banks | R$ 9,447,190 | R$ 6,596,510 |  |
Cash and cash equivalents | R$ 12,283,589 | 9,018,818 | R$ 7,246,498 | R$ 8,345,871
Cash and banks | Fixed |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Average yield p.a. % | 4.70% |  |  |
Country of domicile |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Fixed-term deposits (compromised) | R$ 2,836,399 | R$ 2,422,308 |  |
Country of domicile | Fixed-term deposits | CDI |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Percentage of basis used to calculate interest rate | 101.50% |  |  |

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard -URIDate 2024-03-27 + Details
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