Acquisitions (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Apr. 30, 2015	Mar. 23, 2015
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ (7.9)	$ 80.3
Big Heart [Member]
Business Acquisition [Line Items]
Shares issued				$ 2,035.5
Assumed debt from Big Heart				$ 2,630.2
Cash consideration, net of cash acquired			$ 1,232.1
Total purchase price			$ 5,897.8