Leases - Supplemental Cash and Non-cash Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 38.9	$ 44.8
Operating cash flows from finance leases	0.5	0.5
Financing cash flows from finance leases	2.8	3.4	$ 3.1
Lease assets obtained in exchange for new operating lease liabilities	$ 20.6	$ 15.7