RELATED PARTIES (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2016	Feb. 29, 2016	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016	Oct. 31, 2015
Related Party Transaction [Line Items]
Cash distribution from Banner Life Services					$ 0.0	$ 1.3
Return on capital					0.0	2.3
Affiliated entity | JLL Partners Inc. and DSM | Business Services
Related Party Transaction [Line Items]
Expenses from transactions with related party			$ 0.1	$ 0.1	0.1	0.2
Accounts payable, related parties			0.1		0.1		$ 0.0
Affiliated entity | Koninklijke DSM | Shared Service Functions
Related Party Transaction [Line Items]
Expenses from transactions with related party			1.9	2.5	5.1	5.2
Revenue for services from related parties			0.1	0.8	0.3	0.9
Accounts payable, related parties			1.7		1.7		0.2
Accounts receivable, related parties			0.1		0.1		0.4
Affiliated entity | Banner Life Sciences | Shared Service Functions
Related Party Transaction [Line Items]
Revenue for services from related parties			0.7	1.4	0.7	7.9
Accounts receivable, related parties			1.2		1.2		1.1
Equity Method Investee
Related Party Transaction [Line Items]
Equity method investment values			8.3		8.3		8.7
Equity method gain/(loss)			(0.2)	(0.4)	(0.3)	1.5
Equity Method Investee | Banner Life Sciences
Related Party Transaction [Line Items]
Equity method investment values			2.5		2.5		2.9	$ 5.0
Cash distribution from Banner Life Services	$ 2.4
Equity method gain/(loss)			(0.2)	(0.5)	(0.3)	1.3
Equity Method Investee | Percivia
Related Party Transaction [Line Items]
Equity method investment values			$ 5.7		$ 5.7		5.7
Ownership percentage (as percent)			50.00%		50.00%
Return on capital		$ 1.2
Equity method gain/(loss)			$ 0.0	$ 0.1	$ 0.0	$ 0.2
Equity Method Investee | ChemiePark
Related Party Transaction [Line Items]
Equity method investment values			$ 0.1		$ 0.1		$ 0.1
Ownership percentage (as percent)			47.50%		47.50%