Derivative Instruments (Narrative) (Details) - Forward Contracts [Member] - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Derivative [Line Items]
Minimum maturity period, foreign currency derivative	90 days
Maximum maturity period, foreign currency derivative	1 year
Gains (losses) on foreign currency option contracts	$ (4.6)	$ (1.5)	$ 1.1