Investment Income, Net (Tables)

9 Months Ended

Feb. 28, 2017

Investment Income, Net [Abstract]

Schedule of Investment Income, Net

	For the three months ended				For the nine months ended
	February 28,		February 29,		February 28,		February 29,
In millions	2017		2016		2017		2016
Interest income on corporate funds	$	2.4	$	2.1	$	7.2	$	6.1
Interest expense		(0.6)		(0.2)		(1.9)		(0.7)
Net loss from equity-method investments		(0.6)		(0.2)		(1.7)		(0.7)
Investment income, net	$	1.2	$	1.7	$	3.6	$	4.7