Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details) (USD $)	6 Months Ended
	May 31, 2014
Options
Options outstanding at beginning of period, options	10,531,938
Granted, options	0
Exercised, options	(10,000)
Cancelled, options	(5,747)
Options outstanding at end of period, options	10,516,191
Options exercisable at end of period	9,409,188
Weighted Average Exercise Price in dollars per share
Options outstanding at beginning of period, weighted average exercise price in dollars per share	$ 21.11
Granted, weighted average exercise price in dollars per share	$ 0.00
Exercised, weighted average exercise price in dollars per share	$ 6.32
Cancelled, weighted average exercise price in dollars per share	$ 35.39
Options outstanding at end of period, weighted average exercise price in dollars per share	$ 21.12
Options exercisable at end of period	$ 22.25