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Investment Contract Liabilities - Summary of Contractual Obligations and Commitments Relating to Investment Contracts (Detail) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of Investment Contract Liabilities [line items] |  |
Contractual obligations and commitments | $ 276,411 | $ 249,771
Less than 1 year [Member] |  |
Disclosure of Investment Contract Liabilities [line items] |  |
Contractual obligations and commitments | 268,537 | 241,301
1 to 3 years [Member] |  |
Disclosure of Investment Contract Liabilities [line items] |  |
Contractual obligations and commitments | 2,978 | 2,749
3 to 5 years [Member] |  |
Disclosure of Investment Contract Liabilities [line items] |  |
Contractual obligations and commitments | 1,408 | 1,789
Over 5 years [Member] |  |
Disclosure of Investment Contract Liabilities [line items] |  |
Contractual obligations and commitments | $ 3,488 | $ 3,932

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