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Financial instruments - Risk classification of trade accounts receivable (Details) - BRL (R$) R$ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of internal credit grades [line items] |  |  |
Expected credit losses | R$ 104,209 | R$ 97,934 | R$ 95,053
Trade accounts receivable |  |  |
Disclosure of internal credit grades [line items] |  |  |
Expected credit losses | R$ 121,516 | R$ 30,300 | R$ 31,962

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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. + References No definition available. + Details
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- Definition This element should be used to tag non-restated comparative information only. Allowance account for credit losses of financial assets at beginning of period. Allowance account for credit losses of financial assets at end of period + References No definition available. + Details
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- Details
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