Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 37.4	$ 40.6
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 26.5	$ 17.7