LEASES - Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2020	Oct. 31, 2019
Leases [Abstract]
Operating lease assets	$ 307.5	$ 0.0
Finance lease assets	4.6
Total lease assets	312.1
Current portion of operating lease liabilities	52.3	0.0
Current finance lease liabilities	1.7
Total current lease liabilities	54.0
Non-current operating lease liabilities	257.7	$ 0.0
Non-current finance lease liabilities	2.9
Total non-current lease liabilities	260.6
Total lease liabilities	$ 314.6