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Stock-Based Compensation (Tables)
9 Months Ended
Aug. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Outstanding and Exercisable Stock Options
The following table summarizes stock option transactions for the nine months ended August 31, 2018:
 
Options
 
Weighted
Average Exercise
Price
Options outstanding at beginning of period
9,265,240

 
$
17.64

Granted

 

Exercised
(1,049,260
)
 
16.62

Cancelled
(33,706
)
 
17.29

Options outstanding at end of period
8,182,274

 
$
17.78

Options exercisable at end of period
7,254,706

 
$
18.04