Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1.2	$ 17.4
Other comprehensive income
Foreign currency translation adjustments	2.5	4.3
Pension and other postretirement benefits adjustments, net of tax of $0.3 and $0.5 for 2018 and 2017, respectively	1.4	0.8
Derivatives designated as hedges, net of tax of $0 and $0.2 for 2018 and 2017, respectively	1.1	0.4
Other comprehensive income	5.0	5.5
Comprehensive income	$ 6.2	$ 22.9