PENSION AND POST-RETIREMENT BENEFITS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.6	$ 0.4	$ 1.2	$ 0.9
Interest cost	1.0	1.3	2.0	2.6
Expected return on plan assets	(1.0)	(1.2)	(2.0)	(2.5)
Amortization of actuarial loss	0.7	0.4	1.4	0.8
Net periodic benefit costs	1.3	0.9	2.6	1.8
Other benefit plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.0	0.0	0.1	0.1
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of actuarial loss	0.0	0.0	0.0	0.0
Net periodic benefit costs	$ 0.0	$ 0.0	$ 0.1	$ 0.1