Summary of Significant Accounting Policies (Details Textuals) $ in Thousands	12 Months Ended
	Jul. 31, 2018 USD ($) Derivative	Jul. 31, 2018 Derivative	Jul. 31, 2018 customer Derivative	Jul. 31, 2018 Derivative Segment	Jul. 31, 2017 USD ($) customer Derivative	Jul. 31, 2016 USD ($) customer Derivative	Aug. 01, 2018 USD ($)
New Accounting Pronouncement, Early Adoption [Line Items]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 21,300				$ 107,600	$ 14,700
Business Acquisition, Percentage of Voting Interests Acquired	59.50%	59.50%	59.50%	59.50%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	40.50%	40.50%	40.50%	40.50%
Proceeds from sale of majority-owned subsidiary	$ 1,796				0	0
Deconsolidation, Gain (Loss), Amount	900
Abnormal Costs	68,600
Advertising expenses	5,900				5,600	6,800
Available-for-sale Securities, Amortized Cost Basis						21,100
Proceeds from Sale of Debt Securities, Available-for-sale						21,500
Available-for-sale Securities, Gross Realized Gains						400
Number of operating segments		2		2
Number of reportable segment		2		2
Capitalized Computer Software, Period Increase (Decrease)	$ 15,500					$ 29,800
Capitalized Computer Software, Impairments					$ 19,400
Number of interest rate derivatives held | Derivative	0	0	0	0	0	2
Proceeds from stock options exercised	$ 44,459				$ 31,188	$ 13,240
Minimum
New Accounting Pronouncement, Early Adoption [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption							$ 10,000
Maximum
New Accounting Pronouncement, Early Adoption [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption							$ 15,000
Sales Revenue, Net [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Number of Customers Exceeding Threshold | customer			0		0	0