XML 208 R193.htm IDEA: XBRL DOCUMENT
v3.21.1

Capital Management, Corporate Governance Transparency Policy and Risk Management - Summary of Credit losses Splitted by Class of Financial instrument (Detail) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | $ 9,981,687 | $ 7,003,486
Loans and other financing [member] |  |
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | 9,928,122 | 6,901,953
Loans commitment [Member] |  |
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | 23,200 | 23,514
Other financial assets [Member] |  |
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | 18,929 | 14,032
Other debt securities at amortized cost [member] |  |
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | 5,472 | 63,701
Other debt securities at fair value through OCI [member] |  |
Disclosure of financial assets [line items] |  |
Allowance account for credit losses of financial assets | $ 5,964 | $ 286

X
- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2020-01-01 + Details
Name: | ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bma_LoansAndOtherFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bma_LoansCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bma_OtherFinancialAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bma_OtherDebtSecuritiesAtAmortizedCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bma_OtherDebtSecuritiesAtFairValueThroughOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |