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Invested Assets and Investment Income - Additional Information (Detail) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Disclosure of fair value measurement of assets [Line Items] |  |  |
Fair value of securitized assets | $ 875,574 | $ 833,689 | $ 928,220
Fair value of securitized liabilities | 826,847 | 785,463 | $ 881,328
Transfers out of Level1 and Level 2 of fair value hierarchy , assets held at end of reporting period | 0 | 0 |
Segregated funds [Member] |  |  |
Disclosure of fair value measurement of assets [Line Items] |  |  |
Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period | 0 | 0 |
Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period | 0 | 0 |
Other invested assets [Member] |  |  |
Disclosure of fair value measurement of assets [Line Items] |  |  |
Profit (loss) from associates and joint ventures | 399 | 852 |
Securitized assets [Member] | Fair value [Member] |  |  |
Disclosure of fair value measurement of assets [Line Items] |  |  |
Fair value of securitized assets | 5,782 | 5,167 |
Fair value of securitized liabilities | $ 5,456 | $ 4,865 |

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