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IFRS 7 - Disclosure - Liquidity Risk - Summary of Contractual Maturity Profile of On-Balance Sheet Assets, Liabilities and Equity at their Carrying Values (Detail) - CAD ($) $ in Millions | Jul. 31, 2025 | Apr. 30, 2025 | Oct. 31, 2024 | Jul. 31, 2024 | Apr. 30, 2024 | Oct. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |  |  |  |
Cash and non-interest-bearing deposits with banks |  | $ 19,101 | [1] | $ 14,011 | $ 8,565 | $ 11,684 | [1] | $ 10,299 | $ 20,816
Interest-bearing deposits with banks |  | 36,086 |  |  | 39,499 |  |  |  |
Securities |  | 274,997 |  |  | 254,345 |  |  |  |
Cash collateral on securities borrowed |  | 21,690 |  |  | 17,028 |  |  |  |
Securities purchased under resale agreements |  | 86,210 |  |  | 83,721 |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 285,935 |  |  | 280,672 |  |  |  |
Personal |  | 47,259 |  |  | 46,681 |  |  |  |
Credit card |  | 21,321 |  |  | 20,551 |  |  |  |
Business and government | [2] | 231,414 |  |  | 214,305 |  |  |  |
Allowance for credit losses |  | (4,285) |  | $ (4,191) | (3,917) | (3,920) |  |  |
Derivative instruments |  | 34,614 |  |  | 36,435 |  |  |  |
Other assets |  | 47,913 |  |  |  |  |  |  |
Total assets |  | 1,102,255 |  |  | 1,041,985 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 792,672 |  |  | 764,857 |  |  |  |
Obligations related to securities sold short |  | 20,827 |  |  | 21,642 |  |  |  |
Cash collateral on securities lent |  | 5,304 |  |  | 7,997 |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 145,659 |  |  | 110,153 |  |  |  |
Derivative instruments |  | 36,552 |  |  | 40,654 |  |  |  |
Other liabilities |  | 30,666 |  |  |  |  |  |  |
Subordinated indebtedness |  | 7,699 |  |  | 7,465 |  |  |  |
Equity |  | 62,876 |  |  | 59,007 | $ 57,783 |  |  |
Total liabilities and equities |  | 1,102,255 |  |  | 1,041,985 |  |  |  |
Less than 1 month [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and non-interest-bearing deposits with banks |  | 19,101 |  |  |  |  |  |  |
Interest-bearing deposits with banks |  | 36,086 |  |  |  |  |  |  |
Securities |  | 8,949 |  |  |  |  |  |  |
Cash collateral on securities borrowed |  | 21,690 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 46,936 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 4,914 |  |  |  |  |  |  |
Personal |  | 980 |  |  |  |  |  |  |
Credit card |  | 448 |  |  |  |  |  |  |
Business and government |  | 4,624 |  |  |  |  |  |  |
Derivative instruments |  | 2,516 |  |  |  |  |  |  |
Total assets |  | 146,244 |  |  | 130,008 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 40,083 |  |  |  |  |  |  |
Obligations related to securities sold short |  | 20,827 |  |  |  |  |  |  |
Cash collateral on securities lent |  | 5,304 |  |  |  |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 105,477 |  |  |  |  |  |  |
Derivative instruments |  | 3,466 |  |  |  |  |  |  |
Other liabilities |  | 23 |  |  |  |  |  |  |
Total liabilities and equities |  | 175,180 |  |  | 188,502 |  |  |  |
Later than one months and not later than three months [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 10,392 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 17,496 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 13,288 |  |  |  |  |  |  |
Personal |  | 865 |  |  |  |  |  |  |
Credit card |  | 895 |  |  |  |  |  |  |
Business and government |  | 7,437 |  |  |  |  |  |  |
Derivative instruments |  | 4,574 |  |  |  |  |  |  |
Total assets |  | 54,947 |  |  | 45,680 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 45,283 |  |  |  |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 34,996 |  |  |  |  |  |  |
Derivative instruments |  | 4,257 |  |  |  |  |  |  |
Other liabilities |  | 46 |  |  |  |  |  |  |
Total liabilities and equities |  | 84,582 |  |  | 48,833 |  |  |  |
3 - 6 months [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 13,998 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 12,820 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 20,049 |  |  |  |  |  |  |
Personal |  | 586 |  |  |  |  |  |  |
Credit card |  | 1,343 |  |  |  |  |  |  |
Business and government |  | 14,732 |  |  |  |  |  |  |
Derivative instruments |  | 4,229 |  |  |  |  |  |  |
Total assets |  | 67,757 |  |  | 57,993 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 53,647 |  |  |  |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 1,562 |  |  |  |  |  |  |
Derivative instruments |  | 4,283 |  |  |  |  |  |  |
Other liabilities |  | 70 |  |  |  |  |  |  |
Total liabilities and equities |  | 59,562 |  |  | 75,616 |  |  |  |
6 - 9 months [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 5,904 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 2,350 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 15,364 |  |  |  |  |  |  |
Personal |  | 1,000 |  |  |  |  |  |  |
Credit card |  | 1,343 |  |  |  |  |  |  |
Business and government |  | 12,916 |  |  |  |  |  |  |
Derivative instruments |  | 2,464 |  |  |  |  |  |  |
Total assets |  | 41,341 |  |  | 52,094 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 57,171 |  |  |  |  |  |  |
Derivative instruments |  | 2,158 |  |  |  |  |  |  |
Other liabilities |  | 71 |  |  |  |  |  |  |
Total liabilities and equities |  | 59,400 |  |  | 49,168 |  |  |  |
9 - 12 months [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 7,308 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 3,558 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 34,861 |  |  |  |  |  |  |
Personal |  | 684 |  |  |  |  |  |  |
Credit card |  | 1,343 |  |  |  |  |  |  |
Business and government |  | 19,759 |  |  |  |  |  |  |
Derivative instruments |  | 1,597 |  |  |  |  |  |  |
Total assets |  | 69,110 |  |  | 61,184 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 53,307 |  |  |  |  |  |  |
Derivative instruments |  | 2,258 |  |  |  |  |  |  |
Other liabilities |  | 69 |  |  |  |  |  |  |
Total liabilities and equities |  | 55,634 |  |  | 46,158 |  |  |  |
1 - 2 years [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 34,917 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 3,044 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 86,693 |  |  |  |  |  |  |
Personal |  | 743 |  |  |  |  |  |  |
Credit card |  | 5,373 |  |  |  |  |  |  |
Business and government |  | 54,693 |  |  |  |  |  |  |
Derivative instruments |  | 6,008 |  |  |  |  |  |  |
Total assets |  | 191,471 |  |  | 186,218 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 50,002 |  |  |  |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 624 |  |  |  |  |  |  |
Derivative instruments |  | 6,267 |  |  |  |  |  |  |
Other liabilities |  | 258 |  |  |  |  |  |  |
Total liabilities and equities |  | 57,151 |  |  | 55,388 |  |  |  |
2 - 5 years [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 68,108 |  |  |  |  |  |  |
Securities purchased under resale agreements |  | 6 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 100,753 |  |  |  |  |  |  |
Personal |  | 4,875 |  |  |  |  |  |  |
Credit card |  | 10,576 |  |  |  |  |  |  |
Business and government |  | 82,645 |  |  |  |  |  |  |
Derivative instruments |  | 7,538 |  |  |  |  |  |  |
Total assets |  | 274,501 |  |  | 260,975 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 69,340 |  |  |  |  |  |  |
Obligations related to securities sold under repurchase agreements |  | 3,000 |  |  |  |  |  |  |
Derivative instruments |  | 4,522 |  |  |  |  |  |  |
Other liabilities |  | 568 |  |  |  |  |  |  |
Subordinated indebtedness |  | 131 |  |  |  |  |  |  |
Total liabilities and equities |  | 77,561 |  |  | 73,705 |  |  |  |
Over 5 years [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 50,988 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Residential mortgages |  | 10,013 |  |  |  |  |  |  |
Personal |  | 5,230 |  |  |  |  |  |  |
Business and government |  | 22,927 |  |  |  |  |  |  |
Derivative instruments |  | 5,688 |  |  |  |  |  |  |
Total assets |  | 94,846 |  |  | 101,546 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 24,624 |  |  |  |  |  |  |
Derivative instruments |  | 9,338 |  |  |  |  |  |  |
Other liabilities |  | 782 |  |  |  |  |  |  |
Subordinated indebtedness |  | 7,568 |  |  |  |  |  |  |
Total liabilities and equities |  | 42,312 |  |  | 39,445 |  |  |  |
No specific maturity [member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Securities |  | 74,433 |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |
Personal |  | 32,296 |  |  |  |  |  |  |
Business and government |  | 11,681 |  |  |  |  |  |  |
Allowance for credit losses |  | (4,285) |  |  |  |  |  |  |
Other assets |  | 47,913 |  |  |  |  |  |  |
Total assets |  | 162,038 |  |  | 146,287 |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deposits |  | 399,215 |  |  |  |  |  |  |
Derivative instruments |  | 3 |  |  |  |  |  |  |
Other liabilities |  | 28,779 |  |  |  |  |  |  |
Equity |  | 62,876 |  |  |  |  |  |  |
Total liabilities and equities |  | $ 490,873 |  |  | $ 465,170 |  |  |  |
[1] | Includes restricted cash of $550 million (July 31, 2024: $465 million) and interest-bearing demand deposits with Bank of Canada.
[2] | Includes customers’ liability under acceptances of $8 million (October 31, 2024: $6 million) in business and government loans and acceptances of $8 million (October 31, 2024: $6 million) in other liabilities. Prior period amounts have been revised to conform to the presentation adopted in the first quarter of 2025.

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