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Employee Benefit Plans and Similar Obligations - Summary of Share Based Compensation Plan (Plan 2019-2022) (Detail) - 2019-22 [member]
$ in Millions
12 Months Ended
Dec. 31, 2020
ARS ($)
Dec. 31, 2020
$ / shares
Dec. 31, 2019
ARS ($)
Dec. 31, 2019
$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Amount at the beginning of the fiscal year 758,690      
Granted     758,690  
Settled (246,236)      
Expired (45,086)      
Amount at end of fiscal year 467,368   758,690  
Expense recognized during the fiscal year | $ $ 293   $ 189  
Fair value of shares on grant date (in U.S. dollars) | $ / shares   $ 9.97   $ 9.97