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Investment in joint ventures and associates - Additional Information (Detail) - ARS ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 15, 2020
Oct. 15, 2020
Jul. 23, 2020
Jul. 15, 2020
May 26, 2020
Dec. 31, 2020
Aug. 26, 2020
Disclosure of most significant investments in associates [Line Items]              
Other cash payments to acquire interests in joint ventures       $ 13,750   $ 178,947  
Bottom of range [member]              
Disclosure of most significant investments in associates [Line Items]              
Proportion of voting rights held in joint venture 13.001%            
Play Digital SA and Argentine fintech [Member]              
Disclosure of most significant investments in associates [Line Items]              
Capital Units, Authorized         7,500,000    
Par value per share         $ 1    
Banco BBVA Argentina S A [Member]              
Disclosure of most significant investments in associates [Line Items]              
Capital Units, Authorized         2,500,000    
Par value per share         $ 1    
Proportion of voting rights held in joint venture         33.33%    
Additional capital contribution             $ 27,250
Banco de Galicia y Buenos Aires SAU [Member]              
Disclosure of most significant investments in associates [Line Items]              
Capital Units, Authorized         2,500,000    
Par value per share         $ 1    
Proportion of voting rights held in joint venture         33.33%    
Banco Santander Rio S A [Member]              
Disclosure of most significant investments in associates [Line Items]              
Capital Units, Authorized         2,500,000    
Par value per share         $ 1    
Proportion of voting rights held in joint venture         33.33%    
Play Digital S A [Member]              
Disclosure of most significant investments in associates [Line Items]              
Investments accounted for using equity method           $ 74,396  
Play Digital S A [Member] | Bottom of range [member]              
Disclosure of most significant investments in associates [Line Items]              
Proportion of voting rights held in joint venture   18.1585% 25.00%        
Play Digital S A [Member] | Top of range [member]              
Disclosure of most significant investments in associates [Line Items]              
Proportion of voting rights held in joint venture   25.00% 33.00%