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Investments - Results of Operations (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of subsidiaries [line items]      
Revenues and other operating income $ 2,976 $ 2,721 $ 2,101
Proportionate share of net earnings 9 9 1
Consolidated structured entities      
Disclosure of subsidiaries [line items]      
Revenues and other operating income 24 19 3
Expenses (15) (10) (2)
Proportionate share of net earnings $ 9 $ 9 $ 1