Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Finance lease costs:
Operating expenses	$ 2.5	$ 3.5
Interest expense	0.5	0.5
Total lease costs	80.2	100.4
Short-term lease costs	34.8	47.0
Variable lease costs	3.7	3.5
Total short-term and variable lease costs	38.5	50.5
Operating expenses
Operating lease costs:
Operating lease, cost	51.9	67.9
Selling, general and administrative expenses
Operating lease costs:
Operating lease, cost	$ 25.3	$ 28.5