Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	3 Months Ended
	Feb. 28, 2017 $ / shares shares
Options
Options outstanding at beginning of period, options (in shares) | shares	12,731,545
Granted, options (in shares) | shares	0
Exercised, options (in shares) | shares	(74,854)
Cancelled, options (in shares) | shares	(124,090)
Options outstanding at end of period, options (in shares) | shares	12,532,601
Options exercisable at end of period (in shares) | shares	10,307,866
Weighted Average Exercise Price in dollars per share
Options outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ / shares	$ 18.95
Granted, weighted average exercise price (in dollars per share) | $ / shares	0.00
Exercised, weighted average exercise price (in dollars per share) | $ / shares	8.85
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	19.46
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	19.01
Options exercisable at end of period (in dollars per share) | $ / shares	$ 19.78