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Trade Receivables and Reseller Financing - Breakdown of Expected Losses on Doubtful Accounts (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Summary of trade receivables [line items]    
Reseller financing R$ (800,936) R$ (715,530)
Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 156,006 139,699
Current [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 21,337 26,982
Less than 30 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 2,519 1,250
From thirty 31 to 60 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 1,063 1,642
From sixty one days to Ninety days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 1,313 1,131
From 91 to180 days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing 14,639 12,176
More than 180 Days [member] | Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Reseller financing R$ 115,135 R$ 96,518