Fair Value of Financial Instruments - Fair Value of Financial Liabilities Designated at Fair Value Through Profit or Loss and Changes in Fair Value (Detail) - Senior note liabilities [member] - CAD ($)
$ in Millions

3 Months Ended

Apr. 30, 2026

Jan. 31, 2026

Apr. 30, 2025

Disclosure of detailed information about financial instruments [line items]

^[1]

$ 48,629

$ 47,740

$ 39,127

Change in Fair value Gains/(Losses)

^[1],[2]

507

(105)

1,611

Cumulative change in FV Gains/(Losses)

^[1],[3]

$ 3,672

$ 3,165

$ 6,237

[1]	Changes in fair value attributable to changes in the Bank’s own credit risk are recorded in other comprehensive income. Other changes in fair value are recorded in non-interest income – trading revenues. The offsetting fair value changes from associated derivatives is also recorded in non-interest income – trading revenues.
[2]	Change in the difference between the contractual maturity amount and the carrying value.
[3]	The cumulative change in fair value is measured from the instrument’s date of initial recognition.