Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ (37.4)	$ 15.5	$ (15.3)	$ 3.6
Other comprehensive income, net of tax expense (benefit):
Currency translation adjustments	0.5	0.9	(0.6)	3.4
Pension and other post-retirement plans:
Amortization of actuarial loss and prior service cost included in net income, net of tax of $0.1 and $0.1 for the three months ended February 28, 2019 and 2018, respectively, and $0.2 and $0.4 for the nine months ended February 28, 2019 and 2018, respectively	0.3	0.3	0.8	0.9
Other comprehensive income, net of tax	0.8	1.2	0.2	4.3
Comprehensive income (loss)	$ (36.6)	$ 16.7	$ (15.1)	$ 7.9