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Recoverable taxes - Summary (Details) - BRL (R$) R$ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of Tax Receivables and Payables [Line Items] |  |  |
IRPJ/CSLL – prepayments and withheld taxes | R$ 572,825 | R$ 227,464 |
PIS/COFINS – on acquisitions of property, plant and equipment (1) | 76,007 | 187,126 |
PIS/COFINS – operations | 707,848 | 789,667 |
PIS/COFINS – exclusions from ICMS (2) | 343,981 | 405,407 |
ICMS – on acquisitions of property, plant and equipment (3) | 469,771 | 471,825 |
ICMS – operations (4) | 1,807,873 | 1,654,162 |
Reintegra program (5) | 75,234 | 70,610 |
Other taxes and contributions | 133,407 | 64,444 |
Provision for loss on ICMS credits (6) | (1,733,630) | (1,581,961) | R$ (1,452,435)
Tax Assets | 2,453,316 | 2,288,744 |
Recoverable taxes | 1,488,160 | 1,109,619 |
Recoverable taxes | R$ 965,156 | R$ 1,179,125 |

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- Definition The current amount of current tax assets. [Refer: Current tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 54 -Subparagraph n -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_54_n&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The non-current amount of current tax assets. [Refer: Current tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 54 -Subparagraph n -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_54_n&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of provision for impairment of value added tax on sales and services credits. + References No definition available. + Details
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- Definition The amount of recoverable taxes from other taxes and contributions. + References No definition available. + Details
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- Definition The amount of recoverable taxes excluded ICMS + References No definition available. + Details
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- Definition The amount of recoverable taxes from social integration program and social contribution on revenue relating to acquisition of fixed assets. + References No definition available. + Details
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- Definition The amount of recoverable taxes from social integration program and social contribution on revenue relating to other operations. + References No definition available. + Details
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- Definition The amount of recoverable taxes from value added tax on sales and services relating to acquisition of fixed assets. + References No definition available. + Details
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- Definition Reintegra is a tax incentive program that aims to refund the residual costs of taxes paid throughout the exportation chain to taxpayers in order to make them more competitive on international markets. The credit is calculated by a percentage over on the qualified export revenues. + References No definition available. + Details
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