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Income Tax - Schedule of changes in deferred tax liabilities (Detail) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Deferred tax liabilities [line items] |  |
Net deferred tax liabilities at beginning of the fiscal year | $ 11,146,938 | $ 1,062,726
Profit / (Loss) for deferred taxes recognized in the statement of income | 4,947,508 | (10,084,212)
Net deferred tax liabilities at fiscal year end | $ 6,199,430 | $ 11,146,938

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- Definition Deferred tax liabilities [line items] + References No definition available. + Details
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Period Type: | duration

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- Definition (Loss) /Profit for deferred taxes recognized in total comprehensive income. + References No definition available. + Details
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Namespace Prefix: | bma_
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 + Details
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