SUPPLEMENTAL BALANCE SHEET INFORMATION - Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value	$ 2.4
Accumulated impairment	(0.9)
Net carrying value	1.5
Foreign exchange	(0.2)
Balance, end of period	1.3
In-process research and development
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value	2.2
Accumulated impairment	(0.9)
Net carrying value	1.3
In-process research and development | BLS | Spinoff
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value		$ 7.9
Net carrying value		$ 3.6
Regulatory permits
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value	0.2
Accumulated impairment	0.0
Net carrying value	$ 0.2