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Trade accounts receivables - Breakdown of trade accounts receivable by maturity (Details) - Trade accounts receivable - BRL (R$) R$ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Trade Accounts Receivables [Line Items] |  |
Current financial assets | R$ 6,129,481 | R$ 9,132,860
Current | Current |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 5,376,849 | 8,216,570
Overdue | Up to 30 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 434,549 | 682,142
Overdue | From 31 to 60 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 89,738 | 134,674
Overdue | From 61 to 90 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 61,194 | 38,187
Overdue | From 91 to 120 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 45,916 | 17,701
Overdue | From 121 to 180 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | 25,966 | 12,402
Overdue | From 181 days |  |
Trade Accounts Receivables [Line Items] |  |
Current financial assets | R$ 95,269 | R$ 31,184

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- Definition The amount of current financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_25&doctype=Standard -URIDate 2025-03-27 + Details
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