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Financial assets at fair value through profit or loss - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
ARS ($)
Dec. 31, 2020
$ / shares
Jul. 22, 2019
ARS ($)
Financial assets at fair value through profit or loss [line items]        
Proceeds from equity investments disposal   $ 3,392,851,000    
Equity investments disposal payments term unpaid balance shall be deferred over the following 5 (five) years and settled as follows: (i) 30% of that amount shall be paid in pesos, adjusted by Reference Stabilization Coefficient -an index based on CPI- (CER) at an annual nominal rate of 15% and (ii) 70% in US Dollars at an annual nominal rate of 10 %.      
Profit on equity securities disposal   5,202,018,000    
Prisma Medios de Pago S.A. [Member]        
Financial assets at fair value through profit or loss [line items]        
Equity instruments number of shares transferred | shares 2,344,064      
Equity instruments shares transferred nominal value | $ / shares     $ 1  
Equity investments disposal consideration $ 78,265,273      
Proceeds from equity investments disposal $ 46,457,210      
Equity securities at cost       $ 76,947,895,330
Profit on equity securities disposal   $ 5,202,018,000