Accounting For Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	6 Months Ended
	Jan. 31, 2014
Accounting For Stock-Based Compensation [Abstract]
Options Outstanding, Beginning Balance	7,329,820
Options Outstanding, Granted	847,013
Options Outstanding, Exercised	(754,322)
Options Outstanding, Canceled	(8,665)
Options Outstanding, Ending Balance	7,413,846
Weighted Average Exercise Price, Beginning Balance	$ 23.88
Weighted Average Exercise Price, Granted	$ 42.16
Weighted Average Exercise Price, Exercised	$ 18.41
Weighted Average Exercise Price, Canceled	$ 34.62
Weighted Average Exercise Price, Ending Balance	$ 26.51