Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	6 Months Ended
	May 31, 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	(533)
Options outstanding at end of period, options | shares	12,635,111
Options exercisable at end of period | shares	10,389,189
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	45.68
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