Incentive Plans and Stock-Based Compensation (Details 2) (USD $)	6 Months Ended
	May 31, 2014
Stock Option Activity in Shares [Abstract]
Outstanding at end of period (in shares)	2,606,135
Exercisable at end of period (in shares)	1,654,715
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price - Outstanding End of Period (in dollars per share)	$ 44.43
Weighted Average Exercise Price - Exercisable (in dollars per share)	$ 39.21
Employee and Non-Employee Stock Options [Member]
Stock Option Activity in Shares [Abstract]
Outstanding at beginning of year (in shares)	2,208,314
Granted (in shares)	450,700
Exercised (in shares)	(50,630)
Surrendered (in shares)	(2,249)
Outstanding at end of period (in shares)	2,606,135
Exercisable at end of period (in shares)	1,654,715
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price - Outstanding Beginning of Year (in dollars per share)	$ 40.76
Weighted Average Exercise Price - Granted (in dollars per share)	$ 61.49
Weighted Average Exercise Price - Exercised (in dollars per share)	$ 36.03
Weighted Average Exercise Price - Surrendered (in dollars per share)	$ 41.51
Weighted Average Exercise Price - Outstanding End of Period (in dollars per share)	$ 44.43
Weighted Average Exercise Price - Exercisable (in dollars per share)	$ 39.21