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Capital Management, Corporate Governance Transparency Policy and Risk Management - Summary of Banks's Shareholders (Detail) |  | 12 Months Ended
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Oct. 01, 2021 | Dec. 31, 2021
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest | 24.99% |
Carballo Delfin Jorge Ezequiel [member] |  |
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest |  | 17.47%
Voting Interest |  | 19.19%
ANSES FGS Law No. 26425 [member] |  |
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest |  | 28.80%
Voting Interest |  | 26.91%
Grouped shareholders (Local Stock Exchanges) [member] |  |
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest |  | 10.36%
Voting Interest |  | 9.87%
Grouped shareholders (Foreign stock exchanges) [member] |  |
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest |  | 26.09%
Voting Interest |  | 24.38%
Fideicomiso de Garantía JHB BMA |  |
Disclosure of ownership structure of shareholders [line items] |  |
Participating Interest |  | 17.28%
Voting Interest |  | 19.65%

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- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2021-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2021-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2021-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2021-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The proportion of the voting rights in a subsidiary held by the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2021-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2021-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2021-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2021-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2021-03-24 + Details
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