Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ (3.0)	$ (8.0)	$ 0.7	$ (28.3)
Weighted Average Shares Outstanding:
Basic weighted average shares outstanding (in shares)	47.8	47.6	47.8	47.5
Dilutive effect of stock options and restricted share unit awards (in shares)	0.0	0.0	0.2	0.0
Diluted weighted average shares outstanding (in shares)	47.8	47.6	48.0	47.5
(Loss) Earnings Per Share
Basic (in dollars per share)	$ (0.06)	$ (0.17)	$ 0.02	$ (0.60)
Diluted (in earnings per share)	$ (0.06)	$ (0.17)	$ 0.02	$ (0.60)
Dilutive securities excluded from computation of earnings per share (in shares)	1.7		1.4