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Significant Subsidiaries - Summary List of Significant Subsidiaries (Parenthetical) (Detail) | 12 Months Ended
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Oct. 31, 2025
CIBC Caribbean Bank Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Bank and Trust Company (Cayman) Limited [Member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Fund Administration Services (Asia) Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Bank (Bahamas) Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 87.30%
Sentry Insurance Brokers Ltd [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 87.30%
CIBC Caribbean Bank (Barbados) Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Bank (Cayman) Limited [Member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
FirstCaribbean International Finance Corporation (Netherlands Antilles) N.V. [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
FirstCaribbean International Bank (Curacao) N.V. [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Bank (Jamaica) Limited [Member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Bank (Trinidad and Tobago) Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Trust Company (Bahamas) Limited [Member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%
CIBC Caribbean Wealth Management Bank (Barbados) Limited [member] |
Disclosure of subsidiaries [line items] |
Proportion of ownership in subsidiary | 91.70%

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph 19B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2024-03-27 + Details
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