Accounting For Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	3 Months Ended
	Oct. 31, 2013
Accounting For Stock-Based Compensation [Abstract]
Options Outstanding, Beginning Balance	7,329,820
Options Outstanding, Granted	10,435
Options Outstanding, Exercised	(517,315)
Options Outstanding, Canceled	(3,749)
Options Outstanding, Ending Balance	6,819,191
Weighted Average Exercise Price, Beginning Balance	$ 23.88
Weighted Average Exercise Price, Granted	$ 38.38
Weighted Average Exercise Price, Exercised	$ 17.70
Weighted Average Exercise Price, Canceled	$ 32.81
Weighted Average Exercise Price, Ending Balance	$ 24.36