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Accounts Receivable from Card Issuers - Summary of Allowance for Expected Credit Losses (Detail) - Accounts receivable from card issuers [member] - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Trade receivables [line items]    
Allowance for credit losses R$ 7,236 R$ 5,826
Adoption of new accounting standard (IFRS 9) [member]    
Disclosure of Trade receivables [line items]    
Allowance for credit losses   760
Effect of overlay approach reclassification [member]    
Disclosure of Trade receivables [line items]    
Allowance for credit losses 1,771 R$ 5,066
Reversal of Expected Credit Losses [Member]    
Disclosure of Trade receivables [line items]    
Allowance for credit losses R$ (361)