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Trade Receivables and Reseller Financing - Breakdown of Expected Losses on Doubtful Accounts (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Summary of trade receivables [line items]    
Reseller financing R$ (968,384) R$ (800,936)
Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 197,011 156,006
Current [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 22,872 21,337
Less than 30 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 785 2,519
From thirty 31 to 60 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 1,812 1,063
From sixty one days to Ninety days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 2,397 1,313
From 91 to180 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 14,684 14,639
More than 180 Days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing R$ 154,461 R$ 115,135