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Risk Management - Schedule of Geographic Concentration of Insurance and Investment Contract Liabilities, Including Embedded Derivatives (Detail) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | $ 716,962 | $ 668,764
US and Canada [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 548,424 | 513,152
Asia and Other [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 168,538 | 155,612
Insurance contract liabilities [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 481,994 | 464,392
Insurance contract liabilities [Member] | US and Canada [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 327,458 | 322,265
Insurance contract liabilities [Member] | Asia and Other [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 154,536 | 142,127
Investment contract liabilities [member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 275,217 | 248,425
Investment contract liabilities [member] | US and Canada [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 260,046 | 233,460
Investment contract liabilities [member] | Asia and Other [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 15,171 | 14,965
Reinsurance assets [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | 40,249 | (44,053)
Reinsurance assets [Member] | US and Canada [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | (39,080) | (42,573)
Reinsurance assets [Member] | Asia and Other [Member] |  |
Disclosure of Concentration Risk [Line items] |  |
Concentration risk of liabilities | $ (1,169) | $ (1,480)

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