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Stock-Based Compensation (Tables)
3 Months Ended
Feb. 28, 2014
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, 2014:
 
Options
 
Weighted
Average Exercise
Price
Options outstanding at beginning of period
10,531,938

 
$
21.11

Granted

 

Exercised

 

Cancelled
(4,947
)
 
33.72

Options outstanding at end of period
10,526,991

 
$
21.11

Options exercisable at end of period
9,414,988

 
$
22.24