CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Net income (loss)	$ 61.8	$ 82.8	$ 29.7	$ 55.7
Other comprehensive income (loss), net:
Foreign currency translation adjustments	2.5	(6.4)	7.6	(5.9)
Pension and post-retirement adjustments:
Amortization of prior service cost (credit)	(0.1)	(0.2)	(0.2)	(0.3)
Amortization of unrecognized gain (loss) included in net periodic cost	1.4	1.7	2.6	3.1
Total other comprehensive income (loss)	3.8	(4.9)	10.0	(3.1)
Comprehensive income (loss)	$ 65.6	$ 77.9	$ 39.7	$ 52.6