Goodwill and Long-lived Assets, Net (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2015	Oct. 31, 2015	Jan. 31, 2016	Dec. 31, 2014
Goodwill and Long-lived Assets, Net
Goodwill, Balance	$ 1,328.7		$ 1,286.5	$ 1,069.8
Acquisitions			2.5	296.6
Purchase Price Adjustments	(21.7)		(10.3)
Effect of foreign currency translation	(20.5)		(13.4)	(37.7)
Impairment		$ (310.4)	(310.4)
Goodwill, Balance	$ 1,286.5		$ 954.9	$ 1,328.7