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Fair Value Measurements and Trading-Related Revenue - Summary of Trading Revenue (Detail) - CAD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024
Trading revenue [abstract]
Interest rates	$ 1,026	$ 1,003
Foreign exchange	633	579
Equities	1,131	759
Commodities	365	150
Other	212	55
Total trading-related revenue	3,367	2,546
Reported as:
Net interest income	783	169
Non-interest revenue – trading revenues (losses)	2,584	2,377
Total trading-related revenue	$ 3,367	$ 2,546

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Revenue expense from interest.

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Trading revenue [abstract]

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The amount of trading revenue relating to commodity spot and commodity derivative contracts.

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The amount of trading revenue relating to Canadian and other government trading securities, corporate debt trading instruments and interest rate derivatives.

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The amount of trading revenue relating to trading equities and equity derivatives.

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The amount of trading revenue relating to foreign exchange spot and foreign exchange derivative contracts.

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The amount of trading revenue relating to managed futures, credit investment management, Harris trading and loan trading and sales.

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The amount of trading-related revenues including net interest income arising from interest and dividends related to trading assets and liabilities reported net of interest expense associated with funding and non-interest revenue, excluding underwriting fees and commissions on securities transactions.

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The amount of income (expense) relating to trading assets and liabilities.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard
-URIDate 2024-03-27

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