XML 126 R63.htm IDEA: XBRL DOCUMENT
v3.25.3

Concentration of credit risk (Tables) | 12 Months Ended
--- | ---
Oct. 31, 2025
Text Block [Abstract] |
Exposure to credit risk | Credit exposure by country of ultimate risk
$ millions, as at October 31 |  |  |  |  |  |  |  |  |  |  | 2025 |  |  |  |  |  |  |  |  |  |  |  | 2024 |
|  | Canada |  |  | U.S. |  |  | Other countries |  |  | Total |  |  | Canada |  |  | U.S. |  |  | Other countries |  |  | Total |
On-balance sheet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major assets (1)(2)(3) |  | $ | 657,015 |  |  | $ | 288,069 |  |  | $ | 118,402 |  |  | $ | 1,063,486 |  |  | $ | 627,621 |  |  | $ | 259,280 |  |  | $ | 110,984 |  |  | $ | 997,885 |
Off-balance sheet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit-related arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial institutions |  | $ | 48,031 |  |  | $ | 36,436 |  |  | $ | 7,959 |  |  | $ | 92,426 |  |  | $ | 46,567 |  |  | $ | 31,083 |  |  | $ | 6,522 |  |  | $ | 84,172 |
Governments |  |  | 11,022 |  |  |  | 129 |  |  |  | 126 |  |  |  | 11,277 |  |  |  | 10,913 |  |  |  | 153 |  |  |  | 15 |  |  |  | 11,081 |
Retail |  |  | 211,289 |  |  |  | 1,250 |  |  |  | 684 |  |  |  | 213,223 |  |  |  | 199,324 |  |  |  | 1,125 |  |  |  | 525 |  |  |  | 200,974 |
Corporate |  |  | 85,458 |  |  |  | 60,355 |  |  |  | 18,144 |  |  |  | 163,957 |  |  |  | 80,644 |  |  |  | 49,994 |  |  |  | 13,546 |  |  |  | 144,184 |
Total |  | $ | 355,800 |  |  | $ | 98,170 |  |  | $ | 26,913 |  |  | $ | 480,883 |  |  | $ | 337,448 |  |  | $ | 82,355 |  |  | $ | 20,608 |  |  | $ | 440,411 |
(1) | Major assets consist of cash and deposits with banks, loans and acceptances net of allowance for credit losses, securities, securities borrowed or purchased under resale agreements, and derivative instruments.
(2) | Includes Canadian currency of $630.8 billion (2024: $596.4 billion) and foreign currencies of $432.7 billion (2024: $401.5 billion).
(3) | No industry or foreign jurisdiction accounted for 10% or more of loans and acceptances , net of allowance for credit losses, with the exception of the U.S., which accounted for 17% as at October 31, 2025 (2024: 15 %), the real estate and construction sector , which across all jurisdictions accounted for 10% as at October 31, 2025 (2024: 10 %) and the financial institutions sector , which across all jurisdictions accounted for 10% as at October 31, 2025 (2024: 8%). Canadian residential mortgages accounted for 48% as at October 31, 2025 (2024: 49%) of loans and acceptances , net of allowance for credit losses.

X
- Definition Concentration of credit risk. + References No definition available. + Details
Name: | cm_ConcentrationOfCreditRiskExplanatory
Namespace Prefix: | cm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block [abstract] + References No definition available. + Details
Name: | cm_TextBlockAbstract
Namespace Prefix: | cm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration