Leases - Lease Cost (Details) $ in Millions	12 Months Ended
	Oct. 31, 2020 USD ($)
Operating lease costs:
Operating lease, cost	$ 96.4
Finance lease costs:
Operating expenses(4)	3.5
Interest expense(5)	0.5
Total lease costs	100.4
Short-term lease costs	47.0
Variable lease costs	3.5
Total short-term and variable lease costs	50.5
Operating expenses(1)(2)
Operating lease costs:
Operating lease, cost	67.9
Selling, general and administrative expenses(3)
Operating lease costs:
Operating lease, cost	$ 28.5