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Trade receivables, reseller financing and other receivables - Summary of Movements in the Allowance for Loss Allowance for Expected Credit Losses (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of financial assets [line items]      
Beginning balance R$ 185,278    
Ending balance 173,287 R$ 185,278  
Trade receivables [member]      
Disclosure of financial assets [line items]      
Beginning balance 374,355 382,096 R$ 404,886
Additions 143,828 177,872 194,220
Reversals (130,385) (150,160) (203,994)
Write-offs (65,045) (18,646) (13,016)
Reclassification to assets held for sale   (16,807)  
Ending balance 322,753 374,355 382,096
Reseller Financing - Ipiranga [member]      
Disclosure of financial assets [line items]      
Beginning balance 185,278 197,011 156,006
Additions 45,987 65,536 74,745
Reversals (52,695) (68,982) (29,791)
Write-offs (5,283) (8,287) (3,949)
Ending balance R$ 173,287 R$ 185,278 R$ 197,011