Stock-Based Compensation (Summary of Information Concerning Outstanding and Exercisable Options) (Details) - $ / shares	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Number outstanding (in shares)	6,927,161	6,444,743	6,533,979	6,531,250
Weighted average remaining contractual life (in years)	5 years 4 months 24 days
Weighted average exercise price (in dollars per share)	$ 46.32
Number exercisable (in shares)	5,117,688
Weighted Average Remaining Contractual Life (Years)	4 years 4 months 24 days
Weighted average exercise price (in dollars per share)	$ 43.74
$28.00 to $38.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Stock options, exercise price range, lower range limit (in dollars per share)	28.00
Share options, exercise price range, upper range limit (in dollars per share)	$ 38.99
Number outstanding (in shares)	1,596,910
Weighted average remaining contractual life (in years)	2 years 6 months
Weighted average exercise price (in dollars per share)	$ 33.38
Number exercisable (in shares)	1,596,910
Weighted Average Remaining Contractual Life (Years)	2 years 6 months
Weighted average exercise price (in dollars per share)	$ 33.38
$39.00 to $44.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Stock options, exercise price range, lower range limit (in dollars per share)	39.00
Share options, exercise price range, upper range limit (in dollars per share)	$ 44.99
Number outstanding (in shares)	1,255,615
Weighted average remaining contractual life (in years)	3 years 2 months 12 days
Weighted average exercise price (in dollars per share)	$ 42.51
Number exercisable (in shares)	1,255,615
Weighted Average Remaining Contractual Life (Years)	3 years 2 months 12 days
Weighted average exercise price (in dollars per share)	$ 42.51
$45.00 to $50.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Stock options, exercise price range, lower range limit (in dollars per share)	45.00
Share options, exercise price range, upper range limit (in dollars per share)	$ 50.99
Number outstanding (in shares)	1,567,885
Weighted average remaining contractual life (in years)	6 years 10 months 24 days
Weighted average exercise price (in dollars per share)	$ 45.98
Number exercisable (in shares)	960,561
Weighted Average Remaining Contractual Life (Years)	6 years 1 month 6 days
Weighted average exercise price (in dollars per share)	$ 45.89
$51.00 to $56.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Stock options, exercise price range, lower range limit (in dollars per share)	51.00
Share options, exercise price range, upper range limit (in dollars per share)	$ 56.99
Number outstanding (in shares)	867,614
Weighted average remaining contractual life (in years)	7 years 2 months 12 days
Weighted average exercise price (in dollars per share)	$ 51.82
Number exercisable (in shares)	547,355
Weighted Average Remaining Contractual Life (Years)	7 years 2 months 12 days
Weighted average exercise price (in dollars per share)	$ 51.71
$57.00 and above
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Stock options, exercise price range, lower range limit (in dollars per share)	$ 57.00
Number outstanding (in shares)	1,639,137
Weighted average remaining contractual life (in years)	7 years 8 months 12 days
Weighted average exercise price (in dollars per share)	$ 59.24
Number exercisable (in shares)	757,247
Weighted Average Remaining Contractual Life (Years)	6 years 2 months 12 days
Weighted average exercise price (in dollars per share)	$ 59.13