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Loss Allowance for Expected Credit Losses On Credit Exposures Not Measured at Fair Value Through Profit or Loss - Summary of Maximum exposure to credit risk for Loans and Other Financing (Detail) - ARS ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 267,349,317 | $ 307,633,542
Percentage of maximum exposure to credit risk | 100.00% | 100.00%
Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 248,789,910 | $ 280,564,677
Percentage of maximum exposure to credit risk | 93.06% | 91.20%
Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 15,529,537 | $ 21,796,034
Percentage of maximum exposure to credit risk | 5.81% | 7.09%
Impairments Stage 3 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 3,029,870 | $ 5,272,831
Percentage of maximum exposure to credit risk | 1.13% | 1.71%
Performing [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 257,094,822 | $ 293,639,805
Percentage of maximum exposure to credit risk | 96.17% | 95.45%
Performing [member] | Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 247,998,859 | $ 280,074,262
Performing [member] | Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | 9,095,963 | 13,565,543
Past due but not impaired [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 7,224,625 | $ 8,720,906
Percentage of maximum exposure to credit risk | 2.70% | 2.84%
Past due but not impaired [member] | Bottom of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 33.01% | 33.01%
Past due but not impaired [member] | Top of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 99.99% | 99.99%
Past due but not impaired [member] | Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 791,051 | $ 490,415
Past due but not impaired [member] | Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | 6,433,574 | 8,230,491
High grade [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 203,700,281 | $ 235,013,969
Percentage of maximum exposure to credit risk | 76.20% | 76.40%
High grade [member] | Bottom of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 0.00% | 0.00%
High grade [member] | Top of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 3.50% | 3.50%
High grade [member] | Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 203,625,287 | $ 234,860,526
High grade [member] | Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | 74,994 | 153,443
Standard grade [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 33,792,498 | $ 25,330,938
Percentage of maximum exposure to credit risk | 12.64% | 8.23%
Standard grade [member] | Bottom of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 3.51% | 3.51%
Standard grade [member] | Top of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 7.00% | 7.00%
Standard grade [member] | Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 31,867,028 | $ 23,185,807
Standard grade [member] | Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | 1,925,470 | 2,145,131
Sub- standard grade [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 19,602,043 | $ 33,294,898
Percentage of maximum exposure to credit risk | 7.33% | 10.82%
Sub- standard grade [member] | Bottom of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 7.01% | 7.01%
Sub- standard grade [member] | Top of range [member] |  |
Disclosure of internal credit grades [line items] |  |
Range PD | 33.00% | 33.00%
Sub- standard grade [member] | Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 12,506,544 | $ 22,027,929
Sub- standard grade [member] | Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | 7,095,499 | 11,266,969
Impaired [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 3,029,870 | $ 5,272,831
Percentage of maximum exposure to credit risk | 1.13% | 1.71%
Range PD | 100.00% | 100.00%
Impaired [member] | Impairments Stage 3 [member] |  |
Disclosure of internal credit grades [line items] |  |
Maximum exposure to credit risk | $ 3,029,870 | $ 5,272,831

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 35K -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 36 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_a&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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