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Investments - Results of Operations (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of subsidiaries [line items]      
Revenues and other operating income $ 2,845 $ 3,355 $ 2,976
Equity (loss) income 5 4 9
Total for all consolidated structured entities      
Disclosure of subsidiaries [line items]      
Revenues and other operating income 28 22 24
Expenses (23) (18) (15)
Equity (loss) income $ 5 $ 4 $ 9