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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
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.