Stock Based Compensation - Schedule of Share Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	$ 13.2	$ 3.5	$ 16.2	$ 11.3
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	0.5	0.0	0.5	0.0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	0.2	0.0	0.2	0.0
Management Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense	$ 12.5	$ 3.5	15.5	$ 11.3
Management Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Expense			$ 0.1