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Stock Based Compensation (Tables)
 3 Months Ended
Oct. 31, 2017
Share-based Compensation [Abstract]  
Summary Of Stock Option Activity
The following table summarizes stock option activity during the three months ended October 31, 2017:
 
Options
Outstanding
 
Weighted
Average
Exercise Price
Outstanding as of July 31, 2017
6,685,551

 
$
32.60

Granted
809,550

 
$
45.43

Exercised
(181,826
)
 
$
23.37

Canceled
(8,330
)
 
$
35.62

Outstanding as of October 31, 2017
7,304,945

 
$
34.25
Summary Of Information Concerning Outstanding And Exercisable Options
The following table summarizes information concerning outstanding and exercisable options as of October 31, 2017:
Range of Exercise Prices
 
Number Outstanding
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Weighted
Average
Exercise
Price of Outstanding Options
 
Number
Exercisable
 
Weighted
Average
Exercise
Price of Exercisable Options
$ 0.00 to $22.69
 
1,129,408

 
1.71
 
$
19.67

 
1,129,408

 
$
19.67

$22.70 to $28.69
 
906,002

 
7.87
 
$
27.90

 
315,426

 
$
27.58

$28.70 to $34.69
 
1,444,975

 
4.15
 
$
31.61

 
1,427,244

 
$
31.61

$34.70 to $40.69
 
1,437,465

 
5.89
 
$
37.03

 
1,153,628

 
$
36.66

$40.70 and above
 
2,387,095

 
8.49
 
$
43.47

 
697,995

 
$
42.25

 
 
7,304,945

 
6.00
 
$
34.25

 
4,723,701

 
$
31.29