DISCONTINUED OPERATIONS - Narrative (Details) - Disposed of by sale € in Millions, $ in Millions			3 Months Ended
	Jul. 31, 2015 USD ($)	May 12, 2015 USD ($)	Apr. 30, 2016 EUR (€)	Apr. 30, 2016 USD ($)	Aug. 31, 2015 EUR (€)	Jul. 31, 2015 EUR (€)
Banner Pharmacaps
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash purchase price		$ 36.4
Gain on disposals		$ 2.6
Biosolutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash purchase price | €						€ 0.3
Gain on disposals	$ (24.0)
DPx Fine Chemicals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash purchase price | €					€ 179.0
Gain on disposals				$ 107.0
Proceeds from working capital | €			€ 3.0