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Loans and Allowance for Credit Losses - Summary of Loans that are Past Due but not Classified as Impaired (Parenthetical) (Detail) - Financial assets past due but not impaired [member] - CAD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 2,317	$ 2,323
Maturity Between 90 to 180 Days Past Due [member]
Disclosure of detailed information about financial instruments [line items]
Total loans	$ 7	$ 16

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- Definition

Loans Past Due But Not Impaired

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Details

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Balance Type:
Period Type:

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- Details

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Balance Type:
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