Shareholders' Equity (Schedule Of Treasury Stock) (Details) - shares	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	10,504,199
Schedule of Treasury Shares Activity [Roll Forward]
Treasury Stock, Beginning balance (in shares)	17,044,950
Net issuance upon exercise of stock options (in shares)	(916,789)	(916,566)	(1,008,848)
Treasury Stock, Ending balance (in shares)	18,750,503	17,044,950
Treasury Stock
Schedule of Treasury Shares Activity [Roll Forward]
Treasury Stock, Beginning balance (in shares)	17,044,950	11,237,522
Stock repurchases (in shares)	2,540,000	6,675,147
Net issuance upon exercise of stock options (in shares)	(764,756)	(773,385)
Issuance under compensation plans (in shares)	(59,787)	(85,611)
Other Dispositions During Period Shares	9,904	8,723
Treasury Stock, Ending balance (in shares)	18,750,503	17,044,950	11,237,522