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Insurance and Reinsurance Contract Assets and Liabilities - Potential Impact Arising from Changes to Non-Economic Assumptions on Long Term Care (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 CAD ($) | Dec. 31, 2023 CAD ($)
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
Translation rate | 1.4382 | 1.3186
Translation rate potential impacts on net income, OCI and total comprehensive OCI | 1.3987 | 1.3612
2% adverse change in future mortality rates, gross |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | $ (300) | $ (300)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 0 | 0
Total comprehensive income attributed to shareholders | 0 | 0
2% adverse change in future mortality rates, net |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (300) | (300)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 0 | 0
Total comprehensive income attributed to shareholders | 0 | 0
5% adverse change in future morbidity incidence rates, gross |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (1,400) | (900)
Net income attributed to shareholders | (500) | (800)
Other comprehensive income attributed to shareholders | 200 | 100
Total comprehensive income attributed to shareholders | (300) | (700)
5% adverse change in future morbidity incidence rates, net |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (1,300) | (900)
Net income attributed to shareholders | (400) | (800)
Other comprehensive income attributed to shareholders | 200 | 100
Total comprehensive income attributed to shareholders | (200) | (700)
5% adverse change in future morbidity claims termination rates, gross |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (1,400) | (900)
Net income attributed to shareholders | (1,300) | (1,600)
Other comprehensive income attributed to shareholders | 500 | 200
Total comprehensive income attributed to shareholders | (800) | (1,400)
5% adverse change in future morbidity claims termination rates, net |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (1,300) | (900)
Net income attributed to shareholders | (1,100) | (1,600)
Other comprehensive income attributed to shareholders | 400 | 200
Total comprehensive income attributed to shareholders | (700) | (1,400)
10% adverse change in future policy termination rates, gross |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (400) | (400)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 100 | 0
Total comprehensive income attributed to shareholders | 100 | 0
10% adverse change in future policy termination rates, net |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (400) | (400)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 100 | 0
Total comprehensive income attributed to shareholders | 100 | 0
5% increase in future expense levels, gross |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (100) | (100)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 0 | 0
Total comprehensive income attributed to shareholders | 0 | 0
5% increase in future expense levels, net |  |
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items] |  |
CSM net of NCI | (100) | (100)
Net income attributed to shareholders | 0 | 0
Other comprehensive income attributed to shareholders | 0 | 0
Total comprehensive income attributed to shareholders | $ 0 | $ 0

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