Property and Equipment, Net (Details Textuals) - USD ($) $ in Millions	12 Months Ended
Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 58.8	$ 39.6	$ 34.2
Capitalized Computer Software, Period Increase (Decrease)	15.5		29.8
Capitalized Computer Software, Impairments		19.4
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Amortization expense	$ 5.7	$ 10.6	$ 8.5

Amount of expense for amortization of capitalized computer software costs.

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Amount of impairment loss from capitalized computer software costs.

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Amount of increase (decrease) in capitalized computer software costs.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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