Income Taxes (Reconciliation Of Effective Income Tax Rate And Effective Rate From Continuing Operation) (Details)	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Income Tax Disclosure [Abstract]
At U.S. federal income tax rate	21.00%	21.00%	21.00%
State income tax, net of federal benefit	3.80%	4.20%	3.50%
Change in uncertain tax positions	(1.20%)	(3.50%)	(3.80%)
Excess tax benefits related to stock-based compensation	(3.60%)	(14.30%)	(7.10%)
Impacts of the Tax Act and other legislative changes	0.00%	0.00%	(3.20%)
Noncontrolling interests	(1.20%)	0.80%	(2.40%)
Foreign rate differential	0.10%	(5.00%)	(2.40%)
Taxes related to prior year filings	0.30%	(2.90%)	0.00%
Other	0.20%	0.30%	0.70%
Effective tax rate	19.40%	0.60%	6.30%