XML 125 R110.htm IDEA: XBRL DOCUMENT
v3.21.1

Other Debt Securities - Summary of Other Debt Securities (Detail) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | $ 128,675,720 |
Total Other debt securities measured at fair value through other comprehensive income | 178,005,144 | $ 63,824,735
Debt Securities of Financial Trust provisional Best Consumer Finance | 31,113,789 | 24,004,210
TOTAL OTHER DEBT SECURITIES | 209,118,933 | 87,828,945
Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 4,540,814 | 652,210
Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 44,788,610 | 640,268
Debt Securities of Financial Trust provisional Best Consumer Finance | 30,583,099 | 20,309,976
Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss |  | 62,532,257
Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 530,690 | 3,694,234
US Treasury Bill - Maturity: 01-07-2020 [member] | Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss |  | 652,210
Other [member] | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 66,269 |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 3,318,533
Other [member] | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss |  | 27,012,501
Other private securities [member] | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 27,879 | 3,348,650
Liquidity letters of Central Bank of Argentina in pesos—Maturity: 01-03-2020 [Member] | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss |  | 20,124,827
Liquidity letters of Central Bank of Argentina in pesos—Maturity: 01-07-2020 [Member] | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss |  | 15,394,929
Discount bonds denominated in pesos at 5.83% - Maturity: 12-31-2033 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 437,591
Bonds Par denominated in Pesos - Maturity 12-31-2038 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 31,485
Federal government bonds in pesos - Fixed rate 26% - Maturity: 11-21-2020 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 10,855,842
National treasury bills coupon capitalized in pesos - Maturity: 02-26-2020 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 2,045,071
National treasury bills capitalized in pesos - Maturity: 05-13-2020 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 1,957,560
Federal government bonds in pesos at 22% - Maturity: 05-21-2022 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 1,663,894
Corporate Bonds YPF SA Class 046 - Maturity: 03-04-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 80,217
Corporate Bonds YPF SA Class 043 - Maturity: 10-21-2023 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 100,337
Corporate Bonds Central Térmica Roca SA Class 004 - Maturity: 07-24-2022 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 35,559
Corporate Bonds Albanesi SA Class 003 - Maturity: 06-15-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 38,446
Corporate Bonds Generación Mediterránea SA Class 008 - Maturity: 08-29-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 21,943
Corporate Bonds Rombo Compañía Financiera SA S041 - Maturity: 01-29-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance |  | 69,082
Level 1 [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
TOTAL OTHER DEBT SECURITIES | 115,417,483 | 50,355,730
Level 1 [member] | Federal government treasury bonds in pesos BADLAR + 100 PB - Maturity: 08-05-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 19,275,639 |
Level 1 [member] | Federal government treasury bonds in pesos adjusted by CER – Maturity: 07-22-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 8,941,173 |
Level 1 [member] | Federal government treasury bonds in pesos adjusted by CER - Maturity: 04-17-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 8,601,842 |
Level 1 [member] | Federal government treasury bonds in pesos adjusted by CER - Maturity: 08-05-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 3,419,978 |
Level 1 [member] | Federal government treasury bonds in pesos adjusted by CER - Maturity: 03-25-2023 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 1,039,269 |
Level 1 [member] | Federal government treasury letters at variable rate in pesos - Maturity: 03-31-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 986,265 |
Debt Securities of Financial Trust provisional Best Consumer Finance | 1,583,139 |
Level 1 [member] | Federal government treasury bonds linked to dollar - Maturity: 11-30-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 900,540 |
Level 1 [member] | Federal government treasury bonds in pesos adjusted by CER - Maturity: 03-25-2024 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 875,759 |
Level 1 [member] | Bonds of the Argentine Republic in dollars Step Up - Maturity: 07-09-2030 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 417,330 |
Level 1 [member] | Treasury bills of Province of Neuquén Series 1 Class 1 - Maturity: 04-07-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 264,546 |
Level 1 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-12-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 19,732,940 |
Level 1 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-19-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 17,642,322 |
Level 1 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-05-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 15,109,347 |
Level 1 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-26-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 13,603,450 |
Level 1 [member] | US Treasury Bill - Maturity: 01-14-2021 | Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 2,524,323 |
Level 1 [member] | US Treasury Bill - Maturity: 01-19-2021 | Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 841,433 |
Level 1 [member] | US Treasury Bill - Maturity: 01-21-2021 | Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 673,150 |
Level 1 [member] | US Treasury Bill - Maturity: 01-28-2021 | Foreign Government securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 501,908 |
Level 1 [member] | Federal government treasury bonds adjusted by CER - Maturity: 04-17-2021 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 8,573,109 |
Level 1 [member] | Discount bonds denominated in pesos at 5.83% - Maturity: 12-31-2033 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 183,639 |
Level 1 [member] | Federal government treasury bonds adjusted by CER - Maturity: 03-18-2022 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 55,692 |
Level 1 [member] | Bonds Par denominated in Pesos - Maturity 12-31-2038 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 28,251 |
Level 2 [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
TOTAL OTHER DEBT SECURITIES | 62,587,661 | $ 13,469,005
Level 2 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-21-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 21,218,562 |
Level 2 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-28-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 18,420,266 |
Level 2 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-14-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 12,025,981 |
Level 2 [member] | Liquidity letters of Central Bank of Argentina in pesos - Maturity: 01-07-2021 | Central Bank of Argentina Bills [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Other debt securities measured at fair value through profit and loss | 10,922,852 |
Level 2 [member] | Federal government bonds in pesos at 22% - Maturity: 05-21-2022 | Local Government Securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 20,159,269 |
Level 2 [member] | Corporate Bonds YPF SA Class 046 - Maturity: 03-04-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 97,853 |
Level 2 [member] | Corporate Bonds YPF SA Class 043 - Maturity: 10-21-2023 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 74,269 |
Level 2 [member] | Corporate Bonds Tecpetrol SA Class 003 - Maturity: 02-20-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 49,563 |
Level 2 [member] | Corporate Bonds Central Térmica Roca SA Class 004 - Maturity: 07-24-2022 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 36,863 |
Level 2 [member] | Corporate Bonds Albanesi SA Class 003 - Maturity: 06-15-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 30,897 |
Level 2 [member] | Corporate Bonds Santander Río Bank S.A. Class 021 - Maturity: 01-26-2022 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 25,709 |
Level 2 [member] | Corporate Bonds Generación Mediterránea SA Class 008 - Maturity: 08-29-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 20,973 |
Level 2 [member] | Corporate Bonds Rombo Compañía Financiera SA S041 - Maturity: 01-29-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 17,000 |
Level 3 [member] | Debt Securities in Financial Trusts Secubono Series 201 Class A - Maturity: 08-30-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | 78,659 |
Level 3 [member] | Debt Securities in Financial Trusts Secubono Series 200 Class A - Maturity: 06-28-2021 | Private securities [member] |  |
Disclosure of other debt securities at fair value through profit or loss [line items] |  |
Debt Securities of Financial Trust provisional Best Consumer Finance | $ 71,025 |

X
- Definition Disclosure of other debt securities at fair value through profit or loss [line items] + References No definition available. + Details
Name: | bma_DisclosureOfOtherDebtSecuritiesAtFairValueThroughProfitOrLossLineItems
Namespace Prefix: | bma_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other debt securities. + References No definition available. + Details
Name: | bma_OtherDebtSecurities
Namespace Prefix: | bma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other Debt Securities At Fair Value Through Profit And Loss + References No definition available. + Details
Name: | bma_OtherDebtSecuritiesAtFairValueThroughProfitAndLoss
Namespace Prefix: | bma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other debt securities Measured at amortized cost + References No definition available. + Details
Name: | bma_OtherDebtSecuritiesMeasuredAtAmortizedCost
Namespace Prefix: | bma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other debt securities measured at fair value through other comprehensive income + References No definition available. + Details
Name: | bma_OtherDebtSecuritiesMeasuredAtFairValueThroughOtherComprehensiveIncome
Namespace Prefix: | bma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=bma_ForeignGovernmentSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=bma_LocalGovernmentSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=bma_CentralBankOfArgentinaBillsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=bma_PrivateSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_UsTreasuryBillMaturity01072020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_OtherPrivateSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01032020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosmaturity01072020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_DiscountBondsDenominatedInPesosAt583Maturity12312033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_BondsParDenominatedInPesosMaturity12312038MembersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentBondsInPesosFixedRate26Maturity11212020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_NationalTreasuryBillsCouponCapitalizedInPesosMaturity02262020MemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_NationalTreasuryBillsCapitalizedInPesosMaturity05132020MemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentBondsInPesosAt22Maturity05212022MemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsYpfSaClass046Maturity03042021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsYpfSaClass043Maturity10212023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsCentralTrmicaRocaSaClass004Maturity07242022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsAlbanesiSaClass003Maturity06152021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsGeneracinMediterrneaSaClass008Maturity08292021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsRomboCompaaFinancieraSaS041Maturity01292021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsInPesosBadlar100PbMaturity08052021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsInPesosAdjustedByCerMaturity07222021memberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_Federalgovernmenttreasurybondsinpesosadjustedbycermaturity04172021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_Federalgovernmenttreasurybondsinpesosadjustedbycermaturity08052021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_Federalgovernmenttreasurybondsinpesosadjustedbycermaturity03252023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryLettersAtVariableRateInPesosMaturity03312021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsLinkedToDollarMaturity11302021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsInPesosAdjustmentByCerMaturity03252024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_BondsOfTheArgentineRepublicInDollarsStepUpMaturity07092030Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_TreasuryBillsOfProvinceOfNeuqunSeries1Class1Maturity04072021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01122021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01192021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01052021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01262021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_UsTreasuryBillMaturity01142021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_UsTreasuryBillMaturity01192021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_UsTreasuryBillMaturity01212021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_UsTreasuryBillMaturity01282021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsAdjustedByCerMaturity04172021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentTreasuryBondsAdjustedByCerMaturity03182022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01212021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01282021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01142021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_LiquidityLettersOfCentralBankOfArgentinaInPesosMaturity01072021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_FederalGovernmentBondsInPesosAt22Maturity05212022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsTecpetrolSaClass003Maturity02202021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_CorporateBondsSantanderRoBankSaClass021Maturity01262022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_DebtSecuritiesInFinancialTrustsSecubonoSeries201ClassAMaturity08302021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=bma_DebtSecuritiesInFinancialTrustsSecubonoSeries200ClassAMaturity06282021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |