Employee Benefit Plans (Details) $ in Millions	3 Months Ended	9 Months Ended
	Apr. 30, 2018 USD ($)	Apr. 30, 2018 USD ($) plan
Defined Benefit Plan Disclosure [Line Items]
Number of U.S. plans | plan		2
Annual company retirement contribution in addition to 401 (k) match, percent		3.00%
Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Company contributions		$ 1.5
Estimated future contributions to pension plans	$ 3.7	3.7
Employer discretionary contribution	$ 35.0
Pension Plan | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Company contributions		1.1
Additional future contribution towards pension plans for the remainder of Fiscal 2018		$ 0.2