Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (9.5)	$ 50.1	$ (35.6)	$ 45.2
Other comprehensive (loss) income, net of tax:
Foreign currency translations, net of tax	0.7	(1.2)	1.7	(0.7)
Derivatives	(1.2)		(1.2)
Derivatives		0.0		0.0
Total other comprehensive (loss) income, net of tax	(0.5)	(1.2)	0.5	(0.7)
Comprehensive (loss) income	$ (10.0)	$ 48.9	$ (35.1)	$ 44.5