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Trust Activities - Additional Information (Detail) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of trust activities [line items] |  |
Debt securities and certificates of participation in financial trusts | $ 568,961 | $ 2,637,016
Assets transferred by the Bank | 6,641 | 12,462
Assets managed by the Bank | 2,061,643 | 1,397,282
Bank Trust [member] |  |
Disclosure of trust activities [line items] |  |
Assets managed by the Bank | $ 9,286,164 | $ 8,609,425

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- Definition Disclosure of trust activities [line items] + References No definition available. + Details
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- Definition Financial assets managed by bank. + References No definition available. + Details
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- Definition Financial assets securitized transferred. + References No definition available. + Details
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Namespace Prefix: | bma_
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- Definition Participation certificates and debt securities of financial trusts held. + References No definition available. + Details
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Namespace Prefix: | bma_
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |