(Loss) Earnings per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Loss from continuing operations	$ (26.2)	$ (3.8)	$ (43.6)	$ (22.5)
Loss from operations of discontinued business, net of income taxes	(8.7)	(2.5)	(17.5)	(8.0)
Net loss	$ (34.9)	$ (6.3)	$ (61.1)	$ (30.5)
Weighted average number of common shares outstanding during period	40.5	37.4	40.5	37.6
Dilutive effect of stock-based compensation plans (in shares)	0	0	0	0
Weighted average number of diluted shares outstanding during the period	40.5	37.4	40.5	37.6
(Loss) earnings per common share — basic
Continuing operations	$ (0.65)	$ (0.10)	$ (1.08)	$ (0.60)
Discontinued operations	$ (0.21)	$ (0.07)	$ (0.43)	$ (0.21)
Net loss - basic (dollars per share)	$ (0.86)	$ (0.17)	$ (1.51)	$ (0.81)
(Loss) earnings per common share — diluted
Continuing operations	$ (0.65)	$ (0.10)	$ (1.08)	$ (0.60)
Discontinued operations	$ (0.21)	$ (0.07)	$ (0.43)	$ (0.21)
Net loss - diluted (dollars per share)	$ (0.86)	$ (0.17)	$ (1.51)	$ (0.81)
Anti-dilutive shares excluded from calculation (in shares)	5.9	6.5	6.3	6.2