Accounting For Stock-Based Option Activity (Summary Of Stock Option Activity) (Details) (USD $)	9 Months Ended
	Apr. 30, 2013
Accounting For Stock-Based Compenstation [Abstract]
Options Outstanding, Beginning Balance	8,056,327
Options Outstanding, Granted	934,436
Options Outstanding, Exercised	(1,314,912)
Options Outstanding, Canceled	(78,726)
Options Outstanding, Ending Balance	7,597,125
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 20.97
Weighted Average Exercise Price, Granted	$ 33.84
Weighted Average Exercise Price, Exercised	$ 14.48
Weighted Average Exercise Price, Canceled	$ 34.07
Weighted Average Exercise Price, Outstanding, Ending Balance	$ 23.54