Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11.3	$ (5.8)	$ 6.6	$ (30.5)
Other comprehensive income (loss):
Foreign currency translation	2.1	0.1	6.9	(1.1)
Total comprehensive income (loss)	$ 13.4	$ (5.7)	$ 13.5	$ (31.6)