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Provisions and Contingencies - Balances of escrow deposits (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Summary of escrow deposits [line items]    
Total - non-current assets R$ 949,796 R$ 921,443
Tax matters [member]    
Summary of escrow deposits [line items]    
Total - non-current assets 789,624 753,810
Labor litigation [member]    
Summary of escrow deposits [line items]    
Total - non-current assets 57,603 71,605
Civil and other [member]    
Summary of escrow deposits [line items]    
Total - non-current assets R$ 102,569 R$ 96,028