Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2021	Oct. 31, 2020
Leases [Abstract]
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Other current liabilities	Other current liabilities
Commitments under finance lease arrangements		$ 2.0	$ 2.4
Operating leases, rent expense	$ 45.3