Property and Equipment, Net (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 39.6	$ 34.2	$ 34.9
Capitalized Computer Software, Period Increase (Decrease)		29.8
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Amortization expense	$ 10.6	$ 8.5	$ 5.0