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Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)
3 Months Ended
Feb. 29, 2016
$ / shares
shares
Options  
Options outstanding at beginning of period, options | shares 12,635,644
Granted, options | shares 0
Exercised, options | shares 0
Cancelled, options | shares 0
Options outstanding at end of period, options | shares 12,635,644
Options exercisable at end of period | shares 10,389,722
Weighted Average Exercise Price in dollars per share  
Options outstanding at beginning of period, weighted average exercise price in dollars per share | $ / shares $ 19.39
Granted, weighted average exercise price in dollars per share | $ / shares 0.00
Exercised, weighted average exercise price in dollars per share | $ / shares 0.00
Cancelled, weighted average exercise price in dollars per share | $ / shares 0.00
Options outstanding at end of period, weighted average exercise price in dollars per share | $ / shares 19.39
Options exercisable at end of period | $ / shares $ 20.35