Employee Retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Retirement Benefits [Abstract]
Plan expenses	$ 28.5	$ 17.4	$ 23.4
Projected benefit obligation	35.1	33.4
Fair value of the plan assets	33.0	29.5
Underfunded status of plans	2.1	3.9
Net income recognized	$ 0.1	$ 0.2	$ 6.6