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Trade Receivables and Reseller Financing - Trade receivables (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Summary of trade receivables [line items]    
Trade receivables R$ 3,689,500 R$ 4,150,876
Current 3,635,834 4,069,307
Non-current 53,666 81,569
Domestic customers [member]    
Summary of trade receivables [line items]    
Trade receivables 3,867,902 4,290,996
foreign customers [member]    
Summary of trade receivables [line items]    
Trade receivables 226,484 244,960
Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Trade receivables R$ 404,886 R$ 385,080