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Financial Risk Management - Information about Financial Assets and Liabilities That Accrues Interest Considering Applicable Rate (Detail) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial instruments by type of interest rate [line items]      
Financial assets $ 235,000 $ 233,530 $ 170,759
Financial liabilities 875,818 $ 740,433 $ 423,436
Interest rate risk [member]      
Disclosure of financial instruments by type of interest rate [line items]      
Financial assets 44,961    
Financial liabilities 678,306    
Interest rate risk [member] | Fixed interest rate [member]      
Disclosure of financial instruments by type of interest rate [line items]      
Financial assets 36,055    
Financial liabilities 606,277    
Interest rate risk [member] | Variable interest rate [member]      
Disclosure of financial instruments by type of interest rate [line items]      
Financial assets 8,906    
Financial liabilities $ 72,029