STOCK BASED COMPENSATION - Schedule of Share Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	$ 7.0	$ 2.0	$ 11.0	$ 3.0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	4.0	0.0	5.3	0.0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	1.1	$ 0.0	1.5	$ 0.0
Management Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	1.9		$ 4.2
Management Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	$ 1.0