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Related Parties - Summary of Amounts and Profit or Loss Related to Transactions Generated With Related Parties (Parenthetical) (Detail) - Maximum Average Term [member] - ARS ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Subsidiaries [member] | Macro securities SA [member]    
Disclosure of transactions between related parties [line items]    
Loans and other financing $ 714,987 $ 7,063
Key management personnel of entity or parent [member]    
Disclosure of transactions between related parties [line items]    
Loans and other financing 997,346 1,120,919
Other related parties [member]    
Disclosure of transactions between related parties [line items]    
Loans and other financing $ 4,673,348 $ 4,899,400