XML 96 R53.htm IDEA: XBRL DOCUMENT
v3.25.3

Offsetting of Financial Assets and Financial Liabilities (Tables) | 12 Months Ended
--- | ---
Oct. 31, 2025
Text Block [Abstract] |
Summary of Amounts Offset and Not Offset in the Consolidated Balance Sheet |
(Canadian $ in millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2025 |
|  |  |  |  |  |  |  |  |  |  | Amounts not offset in the balance sheet |  |  |  |
|  | Gross amounts |  |  | Amounts offset in the balance sheet |  |  | Net amounts presented in the balance sheet |  |  | Impact of master netting agreements |  |  | Securities received/pledged as collateral (1) (2) |  |  | Cash collateral |  |  | Net amount (3) |
Financial Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities borrowed or purchased under resale agreements |  | $ | 158,361 |  |  | $ | 28,940 |  |  | $ | 129,421 |  |  | $ | 6,899 |  |  | $ | 121,546 |  |  | $ | 49 |  |  | $ | 927 |
Derivative instruments |  |  | 57,489 |  |  |  | 338 |  |  |  | 57,151 |  |  |  | 43,254 |  |  |  | 2,655 |  |  |  | 5,665 |  |  |  | 5,577 |
|  | $ | 215,850 |  |  | $ | 29,278 |  |  | $ | 186,572 |  |  | $ | 50,153 |  |  | $ | 124,201 |  |  | $ | 5,714 |  |  | $ | 6,504 |
Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments |  | $ | 59,067 |  |  | $ | 338 |  |  | $ | 58,729 |  |  | $ | 43,254 |  |  | $ | 2,657 |  |  | $ | 7,613 |  |  | $ | 5,205 |
Securities lent or sold under repurchase agreements |  |  | 163,907 |  |  |  | 28,940 |  |  |  | 134,967 |  |  |  | 6,899 |  |  |  | 127,526 |  |  |  | 126 |  |  |  | 416 |
|  | $ | 222,974 |  |  | $ | 29,278 |  |  | $ | 193,696 |  |  | $ | 50,153 |  |  | $ | 130,183 |  |  | $ | 7,739 |  |  | $ | 5,621 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2024 |
Financial Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities borrowed or purchased under resale agreements |  | $ | 135,282 |  |  | $ | 24,375 |  |  | $ | 110,907 |  |  | $ | 5,738 |  |  | $ | 103,814 |  |  | $ | 72 |  |  | $ | 1,283 |
Derivative instruments |  |  | 47,662 |  |  |  | 409 |  |  |  | 47,253 |  |  |  | 31,576 |  |  |  | 2,294 |  |  |  | 3,802 |  |  |  | 9,581 |
|  | $ | 182,944 |  |  | $ | 24,784 |  |  | $ | 158,160 |  |  | $ | 37,314 |  |  | $ | 106,108 |  |  | $ | 3,874 |  |  | $ | 10,864 |
Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments |  | $ | 58,712 |  |  | $ | 409 |  |  | $ | 58,303 |  |  | $ | 31,576 |  |  | $ | 10,866 |  |  | $ | 7,378 |  |  | $ | 8,483 |
Securities lent or sold under repurchase agreements |  |  | 135,166 |  |  |  | 24,375 |  |  |  | 110,791 |  |  |  | 5,738 |  |  |  | 104,266 |  |  |  | 258 |  |  |  | 529 |
|  | $ | 193,878 |  |  | $ | 24,784 |  |  | $ | 169,094 |  |  | $ | 37,314 |  |  | $ | 115,132 |  |  | $ | 7,636 |  |  | $ | 9,012 |
| (1) | Financial assets received/pledged as collateral are disclosed at fair value and limited to the net balance sheet exposure (i.e. any over-collateralization is excluded from the table).
| (2) | Certain amounts of collateral are restricted from being sold or repledged except in the event of default or the occurrence of other predetermined events.
| (3) | Not intended to represent our actual exposure to credit risk.

X
- Definition Disclosure of offsetting financial assets and liabilities. + References No definition available. + Details
Name: | bmo_DisclosureOfOffsettingFinancialAssetsAndLiabilitiesExplanatory
Namespace Prefix: | bmo_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | bmo_TextBlockAbstract
Namespace Prefix: | bmo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration