Earnings Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 294.2	$ 385.8	$ 2,944.7
Basic:
Weighted-average common shares (in shares)	49.5	49.3	49.2
Basic earnings per share (in dollars per share)	$ 5.94	$ 7.83	$ 59.80
Diluted:
Effect of dilutive stock options (in shares)	0.3	0.4	0.6
Diluted weighted average common shares (in shares)	49.8	49.7	49.8
Diluted earnings per share (in dollars per share)	$ 5.91	$ 7.76	$ 59.16