Income Taxes (Reconciliation Of Effective Income Tax Rate And Effective Rate From Continuing Operation) (Details)	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Income Tax Disclosure [Abstract]
At U.S. federal income tax rate	21.00%	21.00%	21.00%
State income tax, net of federal benefit	2.20%	3.80%	4.20%
Change in uncertain tax positions	(1.50%)	(1.20%)	(3.50%)
Stock-based compensation	0.70%	(3.60%)	(14.30%)
Noncontrolling interests	(1.00%)	(1.20%)	0.80%
Foreign taxes	3.20%	0.10%	(5.00%)
Taxes related to prior year filings	(0.10%)	0.30%	(2.90%)
Other	(0.80%)	0.20%	0.30%
Effective tax rate	23.70%	19.40%	0.60%