Stock-Based Compensation (Summary of Stock Option Activity) (Details)	3 Months Ended
	Oct. 31, 2021 $ / shares shares
Options
Beginning balance (in shares) | shares	6,444,743
Options granted (in shares) | shares	834,105
Options exercised (in shares) | shares	(70,555)
Options canceled/forfeited (in shares) | shares	(9,131)
Ending balance (in shares) | shares	7,199,162
Weighted Average Exercise Price
Beginning balance (in usd per share) | $ / shares	$ 44.05
Granted (in usd per share) | $ / shares	59.40
Exercised (in usd per share) | $ / shares	38.41
Canceled/forfeited (in usd per share) | $ / shares	50.21
Ending balance (in usd per share) | $ / shares	$ 45.88