FINANCIAL INSTRUMENTS, FAIR VALUE AND RISK MANAGEMENT - Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) (Details) - Net investment hedge - Foreign exchange contract - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange (loss) gain for the period from net investment hedge	$ (4.6)	$ (29.0)	$ 4.0	$ (21.0)
Release of ineffective portion of net investment hedge to consolidated statement of operations	0.0	3.3	0.0	2.2
Net (loss) gain to other comprehensive income for the period related to net investment hedge	(4.6)	(25.7)	4.0	(18.8)
Intercompany loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loss to other comprehensive income (loss) for the period related to foreign exchange	$ 0.0	$ 3.8	$ 0.0	$ 3.0