Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	6 Months Ended
	May 31, 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	(255,623)
Cancelled, options (in shares) | shares	(344,528)
Options outstanding at end of period, options (in shares) | shares	12,131,394
Options exercisable at end of period (in shares) | shares	10,082,581
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	11.93
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	18.26
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	19.12
Options exercisable at end of period (in dollars per share) | $ / shares	$ 19.87