Accounting for Stock-Based Compensation (Summary Of Stock Option Activity) (Details)	9 Months Ended
	Apr. 30, 2016 $ / shares shares
Options Outstanding
Options Outstanding, Beginning Balance (in shares) | shares	7,191,442
Options Outstanding, Granted (in shares) | shares	966,950
Options Outstanding, Exercised (in shares) | shares	(643,199)
Options Outstanding, Canceled (in shares) | shares	(389,961)
Options Outstanding, Ending Balance (in shares) | shares	7,125,232
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning Balance (in usd per share) | $ / shares	$ 29.38
Weighted Average Exercise Price, Granted (in usd per share) | $ / shares	28.16
Weighted Average Exercise Price, Exercised (in usd per share) | $ / shares	18.96
Weighted Average Exercise Price, Canceled (in usd per share) | $ / shares	36.97
Weighted Average Exercise Price, Ending Balance (in usd per share) | $ / shares	$ 29.75