LEASES - Cash Flow (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 30, 2020	Apr. 30, 2020
Leases [Abstract]
Operating cash flows used for operating leases	$ 18.2	$ 35.3
Financing cash flows used for finance leases	0.3	0.7
Leased assets obtained in exchange for new operating lease liabilities	34.4	63.1
Leased assets obtained in exchange for new finance lease liabilities	$ 0.3	$ 0.3