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v3.21.1

Restriction on Dividends Distribution - Additional Information (Detail) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2020 ARS ($) $ / shares | Apr. 30, 2020 ARS ($) | Dec. 31, 2020 ARS ($) $ / shares | Dec. 31, 2020 ARS ($) $ / shares | Dec. 31, 2019 ARS ($) $ / shares | Dec. 31, 2019 ARS ($) $ / shares | Dec. 31, 2018 ARS ($) $ / shares | Dec. 31, 2018 $ / shares
Disclosure restrictions to dividends distribution [line items] |  |  |  |  |  |  |  |
Cash dividends | $ 12,788,268 |  | $ 19,980,438 |  | $ 11,580,876 |  | $ 9,448,973 |
Basic earnings (loss) per share | (per share) |  |  | $ 40.9037 | $ 40.9037 | $ 44.1116 | $ 44.1116 | $ (2.2689) | $ (2.2689)
Debit amounts of Other comprehensive income |  |  | $ 5,691,362 |  |  |  |  |
Top of range [member] |  |  |  |  |  |  |  |
Disclosure restrictions to dividends distribution [line items] |  |  |  |  |  |  |  |
Aggregate dividend distribution |  |  | 3,791,722 |  |  |  |  |
Dividend Distribution [member] |  |  |  |  |  |  |  |
Disclosure restrictions to dividends distribution [line items] |  |  |  |  |  |  |  |
Cash dividends | $ 12,788,268 | $ 10,000,426 |  |  |  |  |  |
Basic earnings (loss) per share | $ / shares | $ 15.64 |  |  |  | $ 10 |  | $ 5 |
Unappropriated retained earnings [member] |  |  |  |  |  |  |  |
Disclosure restrictions to dividends distribution [line items] |  |  |  |  |  |  |  |
Special reserve |  |  | $ 7,279,036 | $ 7,279,036 | $ 3,475,669 | $ 3,475,669 |  |
Basic earnings (loss) per share | $ / shares | $ 20 |  |  |  |  |  |  |
Banco Macro SA [member] |  |  |  |  |  |  |  |
Disclosure restrictions to dividends distribution [line items] |  |  |  |  |  |  |  |
Percentage of legal retained earnings |  |  | 20.00% |  |  |  |  |
Percentage of risk-weighted assets kept as capital maintenance margin |  |  | 3.50% |  |  |  |  |

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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2020-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_66&doctype=Standard -URIDate 2020-01-01 + Details
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