Equity Based Compensation (Summary Of Information Concerning Outstanding And Exercisable Options) (Details) - $ / shares	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in shares)	6,822,390	7,191,442	7,197,882	7,329,820
Weighted Average Remaining Contractual Life (Years)	5 years 7 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 30.09
Number Exercisable (in shares)	5,059,534
Weighted Average Exercise Price (in dollars per share)	$ 28.89
$0.00 to $17.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized Under Stock Option Plans, Exercise Price Range, Lower Range Limit (in dollars per share)	0.00
Shares Authorized Under Stock Option Plans, Exercise Price Range, Upper Range Limit (in dollars per share)	$ 17.69
Number Outstanding (in shares)	701,940
Weighted Average Remaining Contractual Life (Years)	1 year 10 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 17.14
Number Exercisable (in shares)	701,940
Weighted Average Exercise Price (in dollars per share)	$ 17.14
$17.70 to $23.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized Under Stock Option Plans, Exercise Price Range, Lower Range Limit (in dollars per share)	17.70
Shares Authorized Under Stock Option Plans, Exercise Price Range, Upper Range Limit (in dollars per share)	$ 23.69
Number Outstanding (in shares)	1,296,206
Weighted Average Remaining Contractual Life (Years)	2 years 7 months 2 days
Weighted Average Exercise Price (in dollars per share)	$ 21.45
Number Exercisable (in shares)	1,296,206
Weighted Average Exercise Price (in dollars per share)	$ 21.45
$23.70 to $29.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized Under Stock Option Plans, Exercise Price Range, Lower Range Limit (in dollars per share)	23.70
Shares Authorized Under Stock Option Plans, Exercise Price Range, Upper Range Limit (in dollars per share)	$ 29.69
Number Outstanding (in shares)	1,656,585
Weighted Average Remaining Contractual Life (Years)	7 years 1 month 10 days
Weighted Average Exercise Price (in dollars per share)	$ 28.55
Number Exercisable (in shares)	746,735
Weighted Average Exercise Price (in dollars per share)	$ 29.13
$29.70 to $35.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized Under Stock Option Plans, Exercise Price Range, Lower Range Limit (in dollars per share)	29.70
Shares Authorized Under Stock Option Plans, Exercise Price Range, Upper Range Limit (in dollars per share)	$ 35.69
Number Outstanding (in shares)	1,533,036
Weighted Average Remaining Contractual Life (Years)	5 years 10 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 34.23
Number Exercisable (in shares)	1,506,269
Weighted Average Exercise Price (in dollars per share)	$ 34.27
$35.70 and above
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Authorized Under Stock Option Plans, Exercise Price Range, Lower Range Limit (in dollars per share)	$ 35.70
Number Outstanding (in shares)	1,634,623
Weighted Average Remaining Contractual Life (Years)	7 years 10 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 40.19
Number Exercisable (in shares)	808,384
Weighted Average Exercise Price (in dollars per share)	$ 40.78