Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	3 Months Ended
	Feb. 28, 2018 $ / shares shares
Options
Options outstanding at beginning of period, options (in shares) | shares	9,265,240
Granted, options (in shares) | shares	0
Exercised, options (in shares) | shares	(268,954)
Cancelled, options (in shares) | shares	(16,208)
Options outstanding at end of period, options (in shares) | shares	8,980,078
Options exercisable at end of period (in shares) | shares	8,038,678
Weighted Average Exercise Price in dollars per share
Options outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ / shares	$ 17.64
Granted, weighted average exercise price (in dollars per share) | $ / shares	0.00
Exercised, weighted average exercise price (in dollars per share) | $ / shares	10.96
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	15.47
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	17.85
Options exercisable at end of period (in dollars per share) | $ / shares	$ 18.09