Quarterly report pursuant to Section 13 or 15(d)

Investment Income, Net (Details)

v3.3.0.814
Investment Income, Net (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Investment Income, Net [Abstract]    
Interest income on corporate funds $ 1.9 $ 1.9
Interest expense (0.2) (0.3)
Net loss from equity-method investments (0.3) (0.2)
Investment income, net $ 1.4 $ 1.4