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Pay vs Performance Disclosure - CAD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Pay vs Performance Disclosure        
Net Income (Loss) $ 788 $ 1,391 $ 5,431 $ 4,846