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IFRS 7 Disclosures - Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders Arising from Changes to Public Equity Returns (Detail) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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-30% [member] |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | $ (1,100) | $ (2,560)
General fund equity investments | (1,520) | (1,430)
Total underlying sensitivity before hedging | (2,620) | (3,990)
Impact of macro and dynamic hedge assets | 850 | 2,060
Net potential impact on net income attributed to shareholders after impact of hedging | (1,770) | (1,930)
-20% [member] |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | (660) | (1,480)
General fund equity investments | (1,010) | (890)
Total underlying sensitivity before hedging | (1,670) | (2,370)
Impact of macro and dynamic hedge assets | 530 | 1,190
Net potential impact on net income attributed to shareholders after impact of hedging | (1,140) | (1,180)
-10% [member] |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | (300) | (630)
General fund equity investments | (500) | (440)
Total underlying sensitivity before hedging | (800) | (1,070)
Impact of macro and dynamic hedge assets | 240 | 500
Net potential impact on net income attributed to shareholders after impact of hedging | (560) | (570)
+10% [member] |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | 240 | 440
General fund equity investments | 420 | 450
Total underlying sensitivity before hedging | 660 | 890
Impact of macro and dynamic hedge assets | (230) | (470)
Net potential impact on net income attributed to shareholders after impact of hedging | 430 | 420
20% change in market value equity. |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | 450 | 750
General fund equity investments | 820 | 880
Total underlying sensitivity before hedging | 1,270 | 1,630
Impact of macro and dynamic hedge assets | (420) | (820)
Net potential impact on net income attributed to shareholders after impact of hedging | 850 | 810
+30% [member] |  |
Schedule of Potential Immediate Impact on Net Income Attributed to Shareholders by Changes to Public Equity Returns [line items] |  |
Variable annuity guarantees | 610 | 960
General fund equity investments | 1,220 | 1,320
Total underlying sensitivity before hedging | 1,830 | 2,280
Impact of macro and dynamic hedge assets | (570) | (1,110)
Net potential impact on net income attributed to shareholders after impact of hedging | $ 1,260 | $ 1,170

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