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Insurance and Reinsurance Contract Assets and Liabilities - Summary of Insurance Revenue By Transition Method (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | $ 23,972 | $ 23,118
Asia [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 5,056 | 4,734
Canada [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 8,619 | 8,117
U.S. [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 10,194 | 10,245
Other Reporting Segments [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 103 | 22
Contracts Under the Fair Value Method [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 15,892 | 15,831
Contracts Under the Fair Value Method [Member] | Asia [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 2,499 | 2,656
Contracts Under the Fair Value Method [Member] | Canada [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 3,288 | 3,370
Contracts Under the Fair Value Method [Member] | U.S. [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 10,123 | 9,901
Contracts Under the Fair Value Method [Member] | Other Reporting Segments [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | (18) | (96)
Contracts Under the Full Retrospective Method [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 731 | 864
Contracts Under the Full Retrospective Method [Member] | Asia [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 531 | 666
Contracts Under the Full Retrospective Method [Member] | Canada [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 48 | 122
Contracts Under the Full Retrospective Method [Member] | U.S. [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 152 | 76
Other Contracts [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 7,349 | 6,423
Other Contracts [Member] | Asia [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 2,026 | 1,412
Other Contracts [Member] | Canada [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | 5,283 | 4,625
Other Contracts [Member] | U.S. [member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | (81) | 268
Other Contracts [Member] | Other Reporting Segments [Member] |  |
Disclosure of analysis of insurance revenue [line items] |  |
Insurance revenue | $ 121 | $ 118

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- Definition 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 -Number 17 -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 82 -Subparagraph a -Clause ii -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 + Details
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