CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 4.4	$ 7.5	$ 15.6
Other comprehensive income (loss), net of tax:
Currency translation adjustments, net of tax	0.1	(2.4)	2.0
Unrecognized pension and post retirement costs, net of tax expense (benefit) of $(1.0) in 2020, $(1.7) in 2019, and $2.4 in 2018	3.8	6.5	(5.9)
Total other comprehensive income (loss), net of tax	(3.7)	(8.9)	7.9
Comprehensive income (loss)	$ 0.7	$ (1.4)	$ 23.5