Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details) (USD $)	6 Months Ended
	May 31, 2013
Options
Options outstanding at beginning of period, options	10,105,546
Granted, options	0
Exercised, options	(112,586)
Cancelled, options	0
Options outstanding at end of period, options	9,992,960
Options exercisable at end of period	8,431,121
Weighted Average Exercise Price
Options outstanding at beginning of period, weighted average exercise price	$ 21.27
Granted, weighted average exercise price	$ 0.00
Exercised, weighted average exercise price	$ 13.47
Cancelled, weighted average exercise price	$ 0.00
Options outstanding at end of period, weighted average exercise price	$ 21.36
Options exercisable at end of period	$ 23.88