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Insurance and Reinsurance Contract Assets and Liabilities - Composition of Underlying Items (Detail) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Participating |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | $ 123,494 | $ 101,217
Participating | Debt securities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 54,238 | 44,682
Participating | Public equities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 19,846 | 14,442
Participating | Mortgages |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 4,535 | 4,449
Participating | Private placements |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 8,398 | 6,720
Participating | Real estate |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 4,525 | 3,907
Participating | Other |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 31,952 | 27,017
Variable annuity |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 72,061 | 68,749
Variable annuity | Debt securities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Variable annuity | Public equities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Variable annuity | Mortgages |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Variable annuity | Private placements |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Variable annuity | Real estate |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Variable annuity | Other |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 72,061 | 68,749
Unit linked |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 18,771 | 15,539
Unit linked | Debt securities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Unit linked | Public equities |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Unit linked | Mortgages |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Unit linked | Private placements |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Unit linked | Real estate |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | 0 | 0
Unit linked | Other |  |
Disclosure Of Composition Of Underlying Items For Contracts With Direct Participation Features [Line Items] |  |
Underlying assets | $ 18,771 | $ 15,539

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- Definition The fair value of the underlying items for contracts with direct participation features. [Refer: Description of composition of underlying items for contracts with direct participation features] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 111 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_111&doctype=Standard -URIDate 2024-03-27 + Details
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