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Stock-Based Compensation (Tables)
 3 Months Ended
Feb. 28, 2015
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 three months ended February 28, 2015:
 
Options
 
Weighted
Average Exercise
Price
Options outstanding at beginning of period
11,735,042

 
$
20.45

Granted
—

 
—

Exercised
—

 
—

Cancelled
(20,780
)
 
16.13

Options outstanding at end of period
11,714,262

 
$
20.46

Options exercisable at end of period
10,108,073

 
$
21.32