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Financial Instruments Risks - Breakdown by Contractual Maturity of Financial Liabilities (Details) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Up to 1 month [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | $ 141,716,796 | $ 135,797,587
Breakdown by contractual maturity of financial liabilities | 473,165,815 | 415,394,814
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 207,111,405 | 232,513,084
From more than 1 month to 3 month [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 37,208,495 | 36,288,151
Breakdown by contractual maturity of financial liabilities | 26,150,054 | 32,989,897
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 700,808 | 2,756
From more than 3 month to 6 month [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 30,735,275 | 19,850,272
Breakdown by contractual maturity of financial liabilities | 31,502,743 | 11,823,481
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 916,901 | 335,854
From more than 6 month to 12 month [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 33,137,133 | 26,432,729
Breakdown by contractual maturity of financial liabilities | 2,818,747 | 7,815,160
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 2,816,669 | 164,735
From more than 12 month to 24 month [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 33,794,545 | 37,925,667
Breakdown by contractual maturity of financial liabilities | 2,142,351 | 1,595,696
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 184,331 | 528,973
More than 24 months [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 43,647,595 | 57,062,231
Breakdown by contractual maturity of financial liabilities | 4,245,245 | 5,031,776
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | 635,499 | 375,240
Total of financial liabilities [member] |  |
Breakdown by contractual maturity of financial liabilities [line items] |  |
Breakdown By Contractual Maturity Of Financial Assets | 320,239,839 | 313,356,637
Breakdown by contractual maturity of financial liabilities | 540,024,955 | 474,650,824
Financial Guarantees And Loan Commitments Issued Which May Derived In Outflows On Demand | $ 212,365,613 | $ 233,920,642

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