Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (26.0)	$ (4.9)
Other comprehensive income (loss), net of tax:
Foreign currency translations, net of tax	1.2	0.4
Unrealized losses on pension benefit obligation	(0.2)	0.0
Total other comprehensive income, net of tax	1.0	0.4
Comprehensive loss	$ (25.0)	$ (4.5)