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Commitments - Insurance coverage (Detail) - 12 months ended Dec. 31, 2020
R$ in Thousands, $ in Thousands
BRL (R$)
USD ($)
Oxiteno [member]    
Summary of contract commitments [line items]    
Maximum compensation value R$ 5,935 $ 1,142
Ipiranga [member]    
Summary of contract commitments [line items]    
Maximum compensation value 1,530  
Ultracargo [member]    
Summary of contract commitments [line items]    
Maximum compensation value 1,000  
Ultragaz [member]    
Summary of contract commitments [line items]    
Maximum compensation value 272  
Extrafarma [member]    
Summary of contract commitments [line items]    
Maximum compensation value R$ 160