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Equity - Additional Information (Detail) - BRL (R$)
R$ / shares in Units, R$ in Thousands
12 Months Ended
Aug. 11, 2021
Feb. 24, 2021
Aug. 12, 2020
Feb. 19, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Feb. 23, 2022
Feb. 24, 2020
Dec. 31, 2018
Disclosure of classes of share capital [line items]                    
Rights outstanding 31,032   86,978 2,108,542         70,939  
Increase in capital reserves         R$ 1,819 R$ 54,763        
Equity         10,469,240 9,910,265 R$ 9,835,175     R$ 9,800,029
Dividends payable           R$ 479,748        
Dividends per share           R$ 0.44        
Proposed dividends payable         R$ 185,896          
Proposed dividends payable per share         R$ 0.17          
Legal reserve as percentage of net income         5.00%          
Threshold Percentage of Share Capital for Legal Reserve Allocation         20.00%          
Legal reserves         R$ 791,083 R$ 750,010        
Statutory reserve as percentage of net income         50.00%          
Threshold percentage of share capital for investments reserve allocation         100.00%          
Interim dividends, paid         R$ 218,074   R$ 217,382      
Interim dividends, paid per share         R$ 0.2   R$ 0.2      
Major ordinary share transactions [member]                    
Disclosure of classes of share capital [line items]                    
Subscribed and paid-in capital stock               1,115,151,608    
Rights outstanding         2,297,491     43,925    
Treasury shares                    
Disclosure of classes of share capital [line items]                    
Shares held in treasury         23,756,393 24,739,626 26,780,298      
Average cost         R$ 18.13 R$ 19.77 R$ 18.12      
Increase in capital reserves                
Equity         (488,425) (489,068) R$ (485,383)     (485,383)
Interim dividends, paid                
Capital reserve                    
Disclosure of classes of share capital [line items]                    
Increase in capital reserves R$ 448 R$ 1,371 R$ 1,691 R$ 53,072 1,819 54,763        
Incurred costs directly attributable to issuing new shares         2,260          
Equity         596,481 594,049 542,400     542,400
Interim dividends, paid                
Capital reserve | Extrafarma [member]                    
Disclosure of classes of share capital [line items]                    
Increase in capital reserves         498,812          
Investments statutory reserve                    
Disclosure of classes of share capital [line items]                    
Increase in capital reserves                
Retention of profits and investments reserve         4,073,876 3,658,265        
Equity         4,073,876 R$ 3,658,265 3,290,073     R$ 3,412,427
Interim dividends, paid                
Common shares [member]                    
Disclosure of classes of share capital [line items]                    
Subscribed and paid-in capital stock         1,115,107,683 1,115,005,712        
Par value per share         R$ 0          
Rights, preferences and restrictions attaching to class of share capital         one          
Common shares outstanding         50,374,275 47,413,094 46,518,315