(Loss) Earnings per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Loss from continuing operations	$ (16.8)	$ (15.6)
Loss from discontinued operations, net of income taxes	(0.7)	(5.5)
Net loss	$ (17.5)	$ (21.1)
Weighted average number of common shares outstanding during the period - basic	40.8	40.4
Dilutive effect of stock-based compensation plans	0	0
Weighted average number of diluted shares outstanding during the period - diluted	40.8	40.4
Loss per common share — basic
Continuing operations (in dollars per share)	$ (0.41)	$ (0.39)
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.14)
Net loss - basic (in dollars per share)	$ (0.43)	$ (0.52)
Loss per common share — diluted
Continuing operations (in dollars per share)	$ (0.41)	$ (0.39)
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.14)
Net loss - diluted (dollars per share)	$ (0.43)	$ (0.52)
Anti-dilutive shares excluded from calculation (in shares)	4.3	6.5