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Risk Management - Schedule of Risk Concentrations (Detail) - Asset classes and individual investment risks [Member] - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of nature and extent of risks arising from financial instruments [Line Items] |  |
Debt securities and private placements rated as investment grade BBB or higher | 96.00% | 97.00%
Government debt securities as a per cent of total debt securities | 36.00% | 36.00%
Government private placements as a per cent of total private placements | 10.00% | 11.00%
Highest exposure to a single non-government debt security and private placement issuer | $ 1,006 | $ 1,167
Largest single issuer as a per cent of the total equity portfolio | 2.00% | 2.00%
Income producing commercial office properties (2022 – 41% of real estate, 2021 – 47%) | $ 5,486 | $ 6,244
Largest concentration of mortgages and real estate(2) – Ontario Canada (2022 – 27%, 2021 – 28%) | $ 18,343 | $ 18,253

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- Details
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