Shareholders' Equity (Schedule Of Treasury Stock) (Details)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Equity, Class of Treasury Stock [Line Items]
Beginning balance	5,490,725
Net issuance upon exercise of stock options	(1,008,848)	(1,607,081)	(1,379,827)
Ending balance	11,237,522	5,490,725
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Beginning balance	5,490,725	3,980,832
Stock repurchases	6,795,545	2,986,794
Net issuance upon exercise of stock options	(863,249)	(1,288,560)
Issuance under compensation plans	(175,160)	(174,408)
Other activity	(10,339)	(13,933)
Ending balance	11,237,522	5,490,725