Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended				6 Months Ended
	Feb. 10, 2023	Feb. 09, 2022	Apr. 30, 2023	Jan. 31, 2023	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2023	Apr. 30, 2022	Mar. 31, 2017	Dec. 31, 2011
Stockholders' Equity Note [Abstract]
Share repurchase program, authorized amount for repurchase									$ 1,000.0	$ 500.0
Share repurchase program, remaining authorized amount for repurchase			$ 256.4				$ 256.4
Stock repurchase (in shares)			0		0		0	191,200
Treasury stock repurchase						$ 78.5		$ 78.5
Average repurchase price per share (in dollars per share)								$ 410.41
Dividends on common stock	$ 1.5	$ 1.5					$ 1.5	$ 1.5
Dividends on common stock (in dollars per share)	$ 0.03	$ 0.03		$ 0.03		$ 0.03