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Loans - Breakdown of Group's Borrowings (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about loans [abstract]      
Balance at beginning of the year $ 526,760 $ 335,078 $ 191,063
Proceed from loans 139,018 97,351 39,673
Payments of loans (174,913) (93,456) (55,734)
Payments of interest (60,681) (41,606) (26,275)
Accrued interest 58,979 44,570 27,998
Net exchange differences and translation 187,455 185,420 160,016
Result from net monetary position (409) (597) (1,663)
Reclassifications and other movements 2,097    
Balance at the end of the year $ 678,306 $ 526,760 $ 335,078