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Consolidated statement of comprehensive income (Parenthetical) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Apr. 30, 2025
Oct. 31, 2024
Statement of comprehensive income [abstract]          
Gains (losses) on investments in equity-accounted associates and joint ventures included in OCI $ 20 $ (3) $ 1 $ 17 $ 54