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Provisions - Expected Terms to Settle Obligations (Details) - ARS ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Provisions Within 12 Months [Member] | Miscellaneous other provisions [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | $ 868,478 | $ 941,450
Provisions Within 12 Months [Member] | Provision for Commercial Claims [Member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 641,511 | 806,428
Provisions Within 12 Months [Member] | Labor Related Provision [Member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 43,728 | 66,422
Provisions Within 12 Months [Member] | Provision for taxes other than income tax [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 32,836 | 21,510
Provisions Within 12 Months [Member] | Other environment related provision [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 150,403 | 47,090
Provisions Within 12 Months [Member] | Restructuring provision [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 1,976,109 |
Provisions Within 12 Months [Member] | Provision for credit commitments [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 930,577 | 539,627
Provisions After 12 Months [Member] | Miscellaneous other provisions [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 1,538,529 | 1,134,960
Provisions After 12 Months [Member] | Provision for Commercial Claims [Member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 1,272,222 | 847,460
Provisions After 12 Months [Member] | Labor Related Provision [Member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 160,474 | 193,949
Provisions After 12 Months [Member] | Provision for taxes other than income tax [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | 72,759 | 85,733
Provisions After 12 Months [Member] | Other environment related provision [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments | $ 33,074 | 7,818
Provisions After 12 Months [Member] | Provision for credit commitments [member] |  |
Disclosure Of Provisions Expected To Settle Obligations [Line Items] |  |
Provisions For Financial Guarantees And Loan Commitments |  | $ 11,599

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