Employee benefits plans - Roll-forward of actuarial liability (Details) - BRL (R$) R$ in Thousands |
9 Months Ended | 12 Months Ended |
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Sep. 30, 2025 |
Dec. 31, 2024 |
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| Disclosure of defined benefit plans [line items] | ||
| Opening Balance | R$ 721,560 | R$ 833,683 |
| Interest on actuarial liabilities | 58,011 | 73,853 |
| Current service cost | 1,455 | 1,997 |
| Actuarial loss – experience | (125) | |
| Actuarial gain – financial assumptions | (137,649) | |
| Benefits paid directly by entity | (38,433) | (50,199) |
| Closing Balance | R$ 742,593 | R$ 721,560 |
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- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. No definition available.
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Actuarial loss – experience No definition available.
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