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Trade Receivables and Reseller Financing - Breakdown of Expected Losses on Doubtful Accounts (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Summary of trade receivables [line items]      
Loss allowance for expected credit losses R$ 185,278 R$ 197,011  
Reseller Financing - Ipiranga [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 185,278 197,011 R$ 156,006
Reseller Financing - Ipiranga [member] | Current [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 1,514 22,872  
Reseller Financing - Ipiranga [member] | Less than 30 days [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 6,410 785  
Reseller Financing - Ipiranga [member] | 31 to 60 days [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 8,697 1,812  
Reseller Financing - Ipiranga [member] | 61-90 days [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 6,255 2,397  
Reseller Financing - Ipiranga [member] | 91-180 days [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses 9,892 14,684  
Reseller Financing - Ipiranga [member] | More than 180 days [member]      
Summary of trade receivables [line items]      
Loss allowance for expected credit losses R$ 152,510 R$ 154,461