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Corporate Bonds Issuance - Summary of Corporate Bond Liabilities (Parenthetical) (Detail)
Apr. 09, 2018
ARS ($)
May 08, 2017
ARS ($)
Nov. 04, 2016
USD ($)
Dec. 31, 2020
ARS ($)
Jan. 29, 2020
ARS ($)
Oct. 16, 2019
ARS ($)
Oct. 17, 2018
ARS ($)
Apr. 27, 2018
USD ($)
May 08, 2017
USD ($)
Apr. 28, 2017
USD ($)
Apr. 26, 2016
USD ($)
Subordinated Resettable - Class A [member]                      
Disclosure of external credit grades [line items]                      
Corporate bond fixed rate     6.75%                
Corporate bond face value     $ 400,000,000                
Corporate bonds benchmark reset rate     546.30%                
Subordinated Resettable - Class A [member] | Maximum Average Term [member]                      
Disclosure of external credit grades [line items]                      
Corporate bond face value                   $ 1,500,000,000 $ 1,000,000,000
Non-subordinated – Class B [member]                      
Disclosure of external credit grades [line items]                      
Corporate bond face value   $ 4,620,570,000   $ 2,377,696,000         $ 300,000,000    
Corporate bond fixed rate   17.50%                  
Corporate bond face value       $ 511,495,000   $ 501,861,000 $ 1,229,518,000        
Non-subordinated – Class C [member]                      
Disclosure of external credit grades [line items]                      
Corporate bond face value $ 3,207,500,000       $ 44,000,000 $ 750,500,000          
Applicable margin rate 3.50%                    
Non-subordinated – Class C [member] | Maximum Average Term [member]                      
Disclosure of external credit grades [line items]                      
Corporate bond face value               $ 2,500,000,000