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Basis for Preparation of Financial Statements and Applicable Accounting Standards - Summary of Bank's Equity Interest and Voting Rights (Detail) - shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Shares issued | 639,413,408 |  |  | 639,413,408 | 669,663,021
Macro securities SA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  | Common |  |
Shares issued | 12,776,680 |  | 12,776,680 |  |
Total capital stock | 99.925% |  | 99.925% |  |
Voting rights | 99.932% |  | 99.932% |  |
Macro Fiducia SA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  | Common |  |
Shares issued | 46,935,318 |  | 46,935,318 |  |
Total capital stock | 99.046% |  | 99.046% |  |
Voting rights | 99.046% |  | 99.046% |  |
Macro Fondos SGFCISA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  | Common |  |
Shares issued | 327,183 |  | 327,183 |  |
Total capital stock | 99.939% |  | 99.939% |  |
Voting rights | 100.00% |  | 100.00% |  |
Macro Bank Limited [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  | Common |  |
Shares issued | 39,816,899 |  | 39,816,899 |  |
Total capital stock | 99.999% |  | 99.999% |  |
Voting rights | 100.00% |  | 100.00% |  |
Argenpay SAU [Member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  | Common |  |
Shares issued | 341,200,000 | [1] | 241,200,000 |  |
Total capital stock | 100.00% | [1] | 100.00% |  |
Voting rights | 100.00% | [1] | 100.00% |  |
Fintech SGR (Structured entity) |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Type | Common |  |  |  |
Shares issued | 119,993 |  |  |  |
Total capital stock | 24.999% |  |  |  |
Voting rights | 24.999% |  |  |  |
Non-controlling interests [member] | Macro securities SA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Total capital stock | 0.075% |  | 0.075% |  |
Voting rights | 0.068% |  | 0.068% |  |
Non-controlling interests [member] | Macro Fiducia SA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Total capital stock | 0.954% |  | 0.954% |  |
Voting rights | 0.954% |  | 0.954% |  |
Non-controlling interests [member] | Macro Fondos SGFCISA [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Total capital stock | 0.061% |  | 0.061% |  |
Non-controlling interests [member] | Macro Bank Limited [member] |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Total capital stock | 0.001% |  | 0.001% |  |
Non-controlling interests [member] | Fintech SGR (Structured entity) |  |  |  |  |
Basis for preparation of financial statements and applicable accounting standards [line items] |  |  |  |  |
Total capital stock | 75.001% |  |  |  |
Voting rights | 75.001% |  |  |  |
[1] | On December 15, 2021, the Extraordinary Shareholders’ Meeting of Argenpay SAU accepted the irrevocable capital contributions for 100,000 made by Banco Macro SA, through the issuance of 100,000,000 common, registered shares, with a face value of Ps. 1.

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