LEASES - Cash Flow (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Leases [Abstract]
Operating cash flows used for operating liabilities	$ 17.4	$ 17.1
Leased assets obtained in exchange for new operating lease liabilities	$ 1.9	$ 28.7
Weighted-average remaining lease term (years)	10 years 10 months 24 days	10 years 4 months 24 days
Weighted-average discount rate	3.68%	3.39%