Stockholders' Equity (Schedule of Treasury Stock) (Details) - shares	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Schedule of Treasury Shares Activity
Net issuance upon exercise of stock options (in shares)	(365,267)	(1,030,938)	(845,086)
Treasury Stock
Schedule of Treasury Shares Activity
Beginning balance (in shares)	26,620,560	25,304,515
Stock repurchases (in shares)	2,900,000	2,416,741
Net issuance upon exercise of stock options (in shares)	(360,448)	(1,004,298)
Issuance under compensation plans (in shares)	(52,678)	(82,998)
Other activity (in shares)	(17,822)	(13,400)
Ending balance (in shares)	29,089,612	26,620,560	25,304,515