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Trade Receivables and Reseller Financing - Trade receivables (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Summary of trade receivables [line items]    
Trade receivables R$ 3,391,122 R$ 3,689,500
Related parties 2,824 490
Current 3,318,927 3,635,834
Non-current 72,195 53,666
Domestic customers [member]    
Summary of trade receivables [line items]    
Trade receivables 3,443,641 3,867,163
Related parties 151 739
foreign customers [member]    
Summary of trade receivables [line items]    
Trade receivables 326,442 223,308
Related parties 2,984 3,176
Expected losses on doubtful accounts [member]    
Summary of trade receivables [line items]    
Trade receivables R$ 382,096 R$ 404,886