The amount that comprises the change in the carrying amount of the group of insurance contracts arising from: (a) the effect of the time value of money and changes in the time value of money; and (b) the effect of financial risk and changes in financial risk; but (c) excluding any such changes for groups of insurance contracts with direct participation features that would adjust the contractual service margin but do not do so when applying paragraphs 45(b)(ii), 45(b)(iii), 45(c)(ii) or 45(c)(iii) of IFRS 17.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2023-01-01
-Paragraph 110
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_110&doctype=Standard
-URIDate 2023-03-23

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The amount of revenue arising from the groups of insurance contracts issued. Insurance revenue shall depict the provision of services arising from the group of insurance contracts at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those services. [Refer: Insurance contracts issued [member]; Revenue]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2023-01-01
-Paragraph 80
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_80_a&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2023-01-01
-Paragraph 106
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_106&doctype=Standard
-URIDate 2023-03-23

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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_82_a_ii&doctype=Standard
-URIDate 2023-03-23

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The amount of expenses arising from a group of insurance contracts issued, comprising incurred claims (excluding repayments of investment components), other incurred insurance service expenses, amortisation of insurance acquisition cash flows, changes that relate to past service and changes that relate to future service. [Refer: Insurance contracts issued [member]]

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Disclosure of amounts arising from insurance contracts [line items].

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Discount rate used to calculate insurance contract liabilities.

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Duration of insurance contract liabilities to which discount rate applied.

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Investment return on securities supporting insurance contracts.

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Other insurance liabilities.

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Insurance (Narrative) (Details) - CAD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
Insurance (Narrative) (Details) - CAD ($) $ in Millions	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023	Oct. 31, 2023
Disclosure Of Amounts Arising From Insurance Contracts [Line Items]
Insurance finance expense	$ 58	$ 59	$ 180	$ 184
Investment return on securities supporting insurance contracts	35	56	163	206
Insurance revenue	1,665	1,514	3,341	3,056
Insurance service expenses	1,248	1,118	2,614	2,282
Other insurance liabilities	132		$ 132		$ 127
Bottom of range [member]
Disclosure Of Amounts Arising From Insurance Contracts [Line Items]
Insurance liabilities, discount rate			5.30%		5.70%
Insurance liabilities, discount rate period			1 year
Top of range [member]
Disclosure Of Amounts Arising From Insurance Contracts [Line Items]
Insurance liabilities, discount rate			4.90%		5.50%
Insurance liabilities, discount rate period			10 years
Property And Casualty Insurance Contracts [Member]
Disclosure Of Amounts Arising From Insurance Contracts [Line Items]
Insurance finance expense	77	79	$ 198	200
Insurance revenue	1,305	1,170	2,631	2,358
Insurance service expenses	1,033	$ 925	2,204	$ 1,903
Life And Health Insurance Contracts [Member]
Disclosure Of Amounts Arising From Insurance Contracts [Line Items]
Other insurance liabilities	$ 112		$ 112		$ 124