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Fair Value Measurements and Trading-Related Revenue - Summary of Financial Instruments Designated At Fair Value Through Profit Or Loss (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
--- | --- | ---
Securities |  |
Amortized cost | $ 96,610 | $ 115,188
Loans |  |
Consumer instalment and other personal | 92,741 | 92,687
Credit cards | 12,649 | 13,612
Business and government | 380,788 | 384,993
Deposits | 976,202 | 982,440
Securitization and structured entities' liabilities | 51,562 | 40,164
Other liabilities | 37,549 | 36,720
Subordinated debt | 8,500 | 8,377
Fair Value [member] |  |
Securities |  |
Amortized cost | 90,448 | 106,461
Not Carried At Fair Value [member] | At carrying value [member] |  |
Securities |  |
Amortized cost | 96,610 | 115,188
Loans |  |
Residential mortgages | 195,708 | 190,666
Consumer instalment and other personal | 91,867 | 91,889
Credit cards | 11,997 | 13,030
Business and government | 364,265 | 369,776
Loans net of allowance for loan losses | 663,837 | 665,361
Deposits | 920,040 | 928,332
Securitization and structured entities' liabilities | 20,211 | 21,850
Other liabilities | 3,103 | 2,929
Subordinated debt | 8,500 | 8,377
Not Carried At Fair Value [member] | Fair Value [member] |  |
Securities |  |
Amortized cost | 90,448 | 106,461
Loans |  |
Residential mortgages | 194,755 | 188,848
Consumer instalment and other personal | 91,937 | 91,513
Credit cards | 11,997 | 13,030
Business and government | 364,866 | 370,101
Loans net of allowance for loan losses | 663,555 | 663,492
Deposits | 920,927 | 928,689
Securitization and structured entities' liabilities | 20,100 | 21,653
Other liabilities | 2,953 | 2,669
Subordinated debt | $ 8,756 | $ 8,543

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