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Investment Securities - Schedule of Analysis of Net Gain on Sale of Investment Securities (Detail) - CAD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024
Disclosure of financial assets [abstract]
Debt investment securities measured at amortized cost		$ 1
Debt investment securities measured at fair value through other comprehensive income (FVOCI)	$ 71	47
Net gain on sale of investment securities	$ 71	$ 48

X

- Definition

Fair value gain (loss) recognised in other comprehensive income reclassified.

+ References

No definition available.

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X

- Definition

Gain Loss On Sale Of Investment Securities Measured At Amortized Cost.

+ References

No definition available.

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- References

No definition available.

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X

- Definition

The gains (losses) on disposals of investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 98
-Subparagraph d
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-URIDate 2024-03-27

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