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Invested Assets and Investment Income - Schedule of Other Invested Assets Include Investments in Associates and Joint Ventures Accounted Using Equity Method (Detail) - CAD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 10,733 $ 10,323
Percentage of investments in associates carrying value 100.00% 100.00%
Leveraged leases [Member]    
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 3,790 $ 3,840
Percentage of investments in associates carrying value 35.00% 37.00%
Timber and agriculture [Member]    
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 854 $ 822
Percentage of investments in associates carrying value 8.00% 8.00%
Real estate [Member]    
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 1,704 $ 1,876
Percentage of investments in associates carrying value 16.00% 18.00%
Other [Member]    
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 443 $ 487
Percentage of investments in associates carrying value 4.00% 5.00%
Infrastructure [Member]    
Disclosure Of Carrying Value Measurement Of Assets [Line Items]    
Investments in associates carrying value $ 3,942 $ 3,298
Percentage of investments in associates carrying value 37.00% 32.00%