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Minimum cash and minimum capital - Minimum capital (Detail) - ARS ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Minimum Capital [Abstract]    
Credit risk $ 41,910,608 $ 44,561,930
Operational risk 15,140,288 13,623,927
Market risk 227,001 372,032
Total capital 142,146,791 138,508,035
Excess capital $ 84,868,894 $ 79,950,146