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Accounting for Stock-Based Compensation (Tables)
 6 Months Ended
Jan. 31, 2016
Share-based Compensation [Abstract]  
Summary Of Stock Option Activity
The following table summarizes stock option activity during the six months ended January 31, 2016:
 
Options
Outstanding
 
Weighted
Average
Exercise Price
Outstanding at July 31, 2015
7,191,442

 
$
29.38

Granted
941,350

 
$
28.07

Exercised
(361,571
)
 
$
17.35

Canceled
(153,525
)
 
$
37.82

Outstanding at January 31, 2016
7,617,696

 
$
29.62
Summary Of Information Concerning Outstanding And Exercisable Options
The following table summarizes information concerning outstanding and exercisable options as of January 31, 2016:
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 $17.69
 
1,034,947

 
1.91
 
$
17.24

 
1,034,947

 
$
17.24

$17.70 to $23.69
 
1,420,040

 
3.02
 
$
21.47

 
1,420,040

 
$
21.47

$23.70 to $29.69
 
1,740,118

 
7.56
 
$
28.55

 
801,768

 
$
29.12

$29.70 to $35.69
 
1,662,818

 
6.20
 
$
34.22

 
1,658,051

 
$
34.22

$35.70 and above
 
1,759,773

 
8.30
 
$
40.20

 
859,292

 
$
40.81

 
 
7,617,696

 
5.82
 
$
29.62

 
5,774,098

 
$
28.31