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Other Assets - Schedule of Disclosure of the Bond Portfolio Stated at Fair Value (Details) - Bonds - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated at fair value | $ 127.2 | $ 104.4
Within one year |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated at fair value | 0.4 | 1.3
After one year but not more than five years |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated at fair value | 43.1 | 45.7
More than five years |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] |  |
Maturity of bond portfolio, stated at fair value | $ 83.7 | $ 57.4

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