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Income Tax- Additional Information (Detail) - ARS ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2021 | Oct. 24, 2019 | Jan. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Income Taxes [line items] |  |  |  |  |  |
Effective income tax rate |  |  |  | 33.30% | 38.40% | 108.20%
Tax rate effect of adjustments for current tax of prior periods |  |  |  |  |  | 100.00%
Variation of internal rate denominated IPC |  |  |  | 15.00% | 30.00% | 55.00%
Tax rate effect from change in tax rate |  |  | 30.00% |  |  |
Banco Macro SA [member] |  |  |  |  |  |
Disclosure Of Income Taxes [line items] |  |  |  |  |  |
Income tax current |  |  |  | $ 10,230,500 | $ 7,002,124 |
Fiscal Year 2013 To 2017 [Member] | Banco Macro SA [member] |  |  |  |  |  |
Disclosure Of Income Taxes [line items] |  |  |  |  |  |
Income tax refund |  | $ 4,782,766 |  |  |  |
Fiscal Year 2018 [Member] | Banco Macro SA [member] |  |  |  |  |  |
Disclosure Of Income Taxes [line items] |  |  |  |  |  |
Income tax refund |  | $ 5,015,451 |  |  |  |
Forecast [member] |  |  |  |  |  |
Disclosure Of Income Taxes [line items] |  |  |  |  |  |
Tax rate effect of adjustments for current tax of prior periods | 100.00% |  |  |  |  |

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- Definition The amount of current tax expense (income) and adjustments for the current tax of prior periods. [Refer: Current tax expense (income); Adjustments for current tax of prior periods] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 80 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_80&doctype=Standard -URIDate 2020-01-01 + Details
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