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Related Party Transactions - Summary of Carrying amount in Joint Venture and Asoociated Companies (Detail) - CAD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024
Joint ventures where entity is venturer [member]
Disclosure of associates [line items]
Carrying amount	$ 878	$ 907
Share of net income	36	93
Associates [member]
Disclosure of associates [line items]
Carrying amount	908	820
Share of net income	$ 139	$ 114

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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

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The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2024-01-01
-Paragraph 24
-Subparagraph a
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B16&doctype=Appendix&subtype=B
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_e&doctype=Standard
-URIDate 2024-03-27

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- Definition

The entity's share of the profit (loss) from continuing operations of associates and joint ventures accounted for using the equity method. [Refer: Total for all associates [member]; Continuing operations, unless line item indicates otherwise [member]; Investments accounted for using equity method; Total for all joint ventures [member]; Profit (loss) from continuing operations]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 12
-IssueDate 2024-01-01
-Paragraph B16
-Subparagraph a
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-URIDate 2024-03-27

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