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Income and Social Contribution Taxes - Summary of deferred income and social contribution tax assets (Detail) - BRL (R$) R$ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | R$ 510,780 | R$ 396,601
Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 510,780 | 396,601
Tax losses and negative basis for social contribution carryforwards not constituted |  | 224,823 | 76,302
Oil Trading [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 77,155 | 84,372
Ultrapar [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 51,339 | 77,453
Abastece Ai Clube [Member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 0 | 91,861
Tax losses and negative basis for social contribution carryforwards not constituted | [1] | 126,900 | 0
Ipiranga [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 300,409 | 97,071
Ultracargo Soluções Logística [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 33,553 | 30,652
Neogás [Member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards not constituted |  | 45,286 | 45,333
Integra Frotas [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards not constituted |  | 18,927 | 13,335
Stella [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards not constituted |  | 15,686 | 8,634
Millennium [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards not constituted |  | 11,650 | 8,539
Others [member] | Onshore [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Tax losses and negative basis for social contribution carryforwards |  | 48,324 | 15,192
Tax losses and negative basis for social contribution carryforwards not constituted |  | R$ 6,374 | R$ 461
[1] | As of December 31, 2024, the Company reversed the deferred taxes recorded on tax loss carryforwards related to income tax (IRPJ) and social contribution (CSLL) of the subsidiary, based on projections of future realization.

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