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Provisions and contingent liabilities - Additional information (Detail) - BRL (R$) R$ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 21, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 01, 2017
Disclosure of contingent liabilities [line items] |  |  |  |  |
Unused provision reversed, other provisions |  | R$ 28,612 |  |  |
Decrease through provision for tax matters reversed, escrow deposits | R$ 621,009 |  |  |  |
IPIContingency |  | 194,508 | R$ 185,388 |  |
Legal Proceedings Related To Icms |  | 1,357,445 | 1,380,424 |  |
ICMS credits |  | 94,640 | 149,061 |  |
Reversal of alleged non-payment |  | 154,914 | 196,693 |  |
Reversal of inventory differences |  | 279,448 | 282,254 |  |
Reversal of conditioned fruition of fiscal incentive |  | 191,549 | 193,912 |  |
Offset claims and credit dis-allowances |  | 2,049,421 | 1,394,010 |  |
Amortization of goodwill paid on acquisition of subsidiary |  | 266,619 | 251,789 |  |
Surcharge on non-essential products |  | 223,691 | 271,518 |  |
Adjustment On Escrow Deposits |  | R$ 45,336 | 62,217 | R$ 26,969 |
Subsidiary IPP [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Surcharge rate on non-essential products |  | 2.00% |  |  |
Cia Ultragaz [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Contingent liabilities for civil, environmental and regulatory claims |  | R$ 187,460 | 113,756 |  |
Discontinued operations | Oxiteno S. A. Industria e Comercio [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Provision for indemnities |  | 174,408 | 168,567 |  |
Provision for indemnities related to labor claims |  | 95,274 | 92,823 |  |
Provision for indemnities related to civil claims |  | 26,074 | 17,584 |  |
Provision for indemnities related to tax claims |  | 53,060 | 58,160 |  |
Discontinued operations | Extrafarma [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Provision for indemnities |  | 32,400 | 35,074 |  |
Provision for indemnities related to labor claims |  | 12,074 | 16,259 |  |
Provision for indemnities related to civil claims |  | 7,007 | 6,420 |  |
Provision for indemnities related to tax claims |  | 13,319 | 12,395 |  |
Chevron and subsidiary IPP [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Liability provisions |  | 36,146 | 29,022 |  |
Contingent liabilities for labor matters |  | 3,545 | 3,020 |  |
Contingent liabilities for tax assessments on sales |  | 32,380 | 25,777 |  |
Chevron and subsidiary IPP [member] | Subsidiary IPP [member] |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |
Liability provisions |  | R$ 89,952 | R$ 95,905 |  | R$ 198,900

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- Definition The amount of provision for legal proceedings. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Section Example 10 A court case -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex10_TI -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 87 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_87&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of contingent liabilities for ICMS tax assessments on sales. + References No definition available. + Details
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- Definition The amount of Icms credits for contingent liabilities. + References No definition available. + Details
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- Definition The amount of legal proceedings related to Icms for contingent liabilities. + References No definition available. + Details
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