CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Net income (loss)	$ 58.3	$ 61.8	$ 28.4	$ 29.7
Other comprehensive income (loss), net:
Foreign currency translation adjustments	3.0	2.5	(2.6)	7.6
Pension and post-retirement adjustments:
Amortization of prior service cost (credit)	0	(0.1)	(0.1)	(0.2)
Amortization of unrecognized gain (loss) included in net periodic cost	0.5	1.4	1.4	2.6
Total other comprehensive income (loss)	3.5	3.8	(1.3)	10.0
Comprehensive income (loss)	$ 61.8	$ 65.6	$ 27.1	$ 39.7