v3.26.1
Earnings Per Share - Summary of Earnings Per Share (Detail) - CAD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2026
Apr. 30, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Basic earnings per common share          
Net income attributable to common shareholders $ 2,778 $ 2,468 $ 2,313 $ 7,401 $ 5,179
Foreign currency loss on redemption of Subordinated Additional Tier 1 Capital Notes     (22)   (22)
Net income attributable to common shareholders used to calculate basic earnings per common share (Basic) $ 2,778 $ 2,468 $ 2,291 $ 7,401 $ 5,157
Weighted average number of common shares outstanding (Basic) 1,223 1,230 1,244 1,229 1,245
Basic earnings per common share [1] $ 2.27 $ 2.01 $ 1.84 $ 6.02 $ 4.14
Diluted earnings per common share          
Net income attributable to common shareholders used to calculate basic earnings per common share (diluted) $ 2,778 $ 2,468 $ 2,291 $ 7,401 $ 5,157
Dilutive impact of share-based payment options and others [2]       (9) (136)
Net income attributable to common shareholders (diluted) $ 2,778 $ 2,468 $ 2,291 $ 7,392 $ 5,021
Weighted average number of common shares outstanding (diluted) 1,223 1,230 1,244 1,229 1,245
Dilutive impact of share-based payment options and others [2] 3 2 1 3 5
Weighted average number of diluted common shares outstanding 1,226 1,232 1,245 1,232 1,250
Diluted earnings per common share [1] $ 2.27 $ 2 $ 1.84 $ 6 $ 4.02
[1] Earnings per share calculations are based on full dollar and share amounts.
[2] Certain options were not included in the calculation of diluted earnings per share as they were anti-dilutive.