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Insurance Contract Liabilities and Reinsurance Assets - Summary of Composition of Insurance Contract Liabilities and Reinsurance Assets by Line of Business and Reporting Segment (Detail) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | $ 323,731 | $ 347,744 |
Total reinsurance ceded | 47,674 | 44,531 |
Total, gross of reinsurance ceded | 371,405 | 392,275 | $ 385,554
Other insurance contract liabilities [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Total, gross of reinsurance ceded | 17,136 | 15,472 | $ 14,377
Gross insurance contract liabilities [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 323,731 | 347,744 |
Total reinsurance ceded | 47,674 | 44,531 |
Total, gross of reinsurance ceded | 371,405 | 392,275 |
Gross insurance contract liabilities [Member] | Corporate and other [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | (38) | (291) |
Total reinsurance ceded | 134 | 202 |
Total, gross of reinsurance ceded | 96 | (89) |
Gross insurance contract liabilities [Member] | Asia [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 111,341 | 111,432 |
Total reinsurance ceded | 2,727 | 2,749 |
Total, gross of reinsurance ceded | 114,068 | 114,181 |
Gross insurance contract liabilities [Member] | Canada [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 78,650 | 89,373 |
Total reinsurance ceded | 1,676 | 430 |
Total, gross of reinsurance ceded | 80,326 | 89,803 |
Gross insurance contract liabilities [Member] | U.S. [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 133,778 | 147,230 |
Total reinsurance ceded | 43,137 | 41,150 |
Total, gross of reinsurance ceded | 176,915 | 188,380 |
Gross insurance contract liabilities [Member] | Individual insurance participating [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 86,798 | 86,695 |
Total reinsurance ceded | 8,552 | 8,144 |
Total, gross of reinsurance ceded | 95,350 | 94,839 |
Gross insurance contract liabilities [Member] | Individual insurance participating [Member] | Asia [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 66,294 | 64,586 |
Gross insurance contract liabilities [Member] | Individual insurance participating [Member] | Canada [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 12,637 | 13,518 |
Gross insurance contract liabilities [Member] | Individual insurance participating [Member] | U.S. [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 7,867 | 8,591 |
Gross insurance contract liabilities [Member] | Individual insurance non-participating [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 140,158 | 151,108 |
Total reinsurance ceded | 22,434 | 20,767 |
Total, gross of reinsurance ceded | 162,592 | 171,875 |
Gross insurance contract liabilities [Member] | Individual insurance non-participating [Member] | Corporate and other [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | (640) | (676) |
Gross insurance contract liabilities [Member] | Individual insurance non-participating [Member] | Asia [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 34,684 | 36,387 |
Gross insurance contract liabilities [Member] | Individual insurance non-participating [Member] | Canada [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 38,325 | 44,320 |
Gross insurance contract liabilities [Member] | Individual insurance non-participating [Member] | U.S. [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 67,789 | 71,077 |
Gross insurance contract liabilities [Member] | Annuities and pensions [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 31,111 | 37,452 |
Total reinsurance ceded | 15,793 | 14,681 |
Total, gross of reinsurance ceded | 46,904 | 52,133 |
Gross insurance contract liabilities [Member] | Annuities and pensions [Member] | Corporate and other [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 24 | 22 |
Gross insurance contract liabilities [Member] | Annuities and pensions [Member] | Asia [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 6,221 | 6,869 |
Gross insurance contract liabilities [Member] | Annuities and pensions [Member] | Canada [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 13,593 | 16,554 |
Gross insurance contract liabilities [Member] | Annuities and pensions [Member] | U.S. [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 11,273 | 14,007 |
Gross insurance contract liabilities [Member] | Other insurance contract liabilities [Member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 65,664 | 72,489 |
Total reinsurance ceded | 895 | 939 |
Total, gross of reinsurance ceded | 66,559 | 73,428 |
Gross insurance contract liabilities [Member] | Other insurance contract liabilities [Member] | Corporate and other [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 578 | 363 |
Gross insurance contract liabilities [Member] | Other insurance contract liabilities [Member] | Asia [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 4,142 | 3,590 |
Gross insurance contract liabilities [Member] | Other insurance contract liabilities [Member] | Canada [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | 14,095 | 14,981 |
Gross insurance contract liabilities [Member] | Other insurance contract liabilities [Member] | U.S. [member] |  |  |
Disclosure of insurance contract liabilities and reinsurance assets [line items] |  |  |
Net insurance contract liabilities | $ 46,849 | $ 53,555 |

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