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Intangible Assets - Additional Information (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]    
Period of evaluation 5 years  
Impairment loss R$ 593,280  
Software [member]    
Disclosure of detailed information about intangible assets [line items]    
Software in progress R$ 35,718 R$ 56,472
Bottom of range [member]    
Disclosure of detailed information about intangible assets [line items]    
Discount rate 8.50%  
Real growth rate 0.00%  
Top of range [member]    
Disclosure of detailed information about intangible assets [line items]    
Discount rate 11.00%  
Real growth rate 1.00%  
Extrafarma [member]    
Disclosure of detailed information about intangible assets [line items]    
Period of evaluation 10 years  
Period to maturity 4 years