Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	3 Months Ended
	Feb. 28, 2019 $ / shares shares
Options
Options outstanding at beginning of period, options (in shares) | shares	7,237,544
Granted, options (in shares) | shares	0
Exercised, options (in shares) | shares	(62,292)
Cancelled, options (in shares) | shares	0
Options outstanding at end of period, options (in shares) | shares	7,175,252
Options exercisable at end of period (in shares) | shares	6,886,378
Weighted Average Exercise Price in dollars per share
Options outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ / shares	$ 16.02
Granted, weighted average exercise price (in dollars per share) | $ / shares	0.00
Exercised, weighted average exercise price (in dollars per share) | $ / shares	13.36
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	0.00
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	16.04
Options exercisable at end of period (in dollars per share) | $ / shares	$ 16.04