v3.26.1
Earnings (Loss) Per Share - Schedule of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2026
Jan. 31, 2026
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2026
Apr. 30, 2025
Earnings Per Share [Abstract]            
Net income (loss) $ (77.9) $ 130.8 $ 87.7 $ 104.3 $ 52.9 $ 192.0
Basic:            
Weighted-average common shares (in shares) 195.0   199.9   195.4 199.8
Basic (loss) earnings per share (in dollars per share) $ (0.40)   $ 0.44   $ 0.27 $ 0.96
Diluted:            
Weighted-average common shares (in shares) 195.0   199.9   195.4 199.8
Effect of dilutive stock plans (in shares) 0.0   0.8   0.7 1.1
Diluted weighted average common shares (in shares) 195.0   200.7   196.1 200.9
Diluted (loss) earnings per share (in dollars per share) $ (0.40)   $ 0.44   $ 0.27 $ 0.96