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

Jul. 31, 2026

Apr. 30, 2026

Jul. 31, 2025

Disclosure of detailed information about financial instruments [line items]

^[1]

$ 52,864

$ 48,629

$ 43,536

Change in Fair value Gains/(Losses)

^[1],[2]

517

507

(1,633)

Cumulative change in FV Gains/(Losses)

^[1],[3]

$ 4,189

$ 3,672

$ 4,604

[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.