PENSION AND POST-RETIREMENT BENEFITS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Anticipated contributions required under the defined benefit pension plans and other benefit plans			$ 3.9
Contributions made under the defined benefit pension plans and other benefit plans					$ 5.2
Employee future benefit expense	$ 2.2	$ 1.6	4.5	$ 3.3
Italy
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement employer contribution			3.9		$ 3.4
Deferred compensation arrangement employer contribution related expenses	$ 0.9	$ 0.7	$ 1.8	$ 1.4