Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	9 Months Ended
	Aug. 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	(1,204,676)
Cancelled, options (in shares) | shares	(945,742)
Options outstanding at end of period, options (in shares) | shares	10,581,127
Options exercisable at end of period (in shares) | shares	8,556,885
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	17.17
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	28.51
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	18.30
Options exercisable at end of period (in dollars per share) | $ / shares	$ 18.98