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Intangible Assets - Additional Information (Detail)
R$ in Thousands
 12 Months Ended
Dec. 31, 2019
BRL (R$)
Disclosure of detailed information about intangible assets [line items]  
Period of evaluation 5 years
Impairment loss R$ 593,280
Bottom of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Discount rate 8.90%
Real growth rate 0.00%
Top of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Discount rate 12.10%
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