(Loss) Earnings per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator [Abstract]
Loss from continuing operations	$ (61.4)	$ (26.2)	$ (98.0)	$ (43.6)
Loss from discontinued operations, net of income taxes	0	(8.7)	(2.3)	(17.5)
Net loss	$ (61.4)	$ (34.9)	$ (100.3)	$ (61.1)
Denominator [Abstract]
Weighted average number of common shares outstanding during the period - basic	41.2	40.5	41.0	40.5
Dilutive effect of stock-based compensation plans	0	0	0	0
Weighted average number of diluted shares outstanding during the period - diluted	41.2	40.5	41.0	40.5
Loss per common share — basic
Continuing operations (in dollars per share)	$ (1.49)	$ (0.65)	$ (2.39)	$ (1.08)
Discontinued operations (in dollars per share)	$ 0.00	$ (0.21)	$ (0.06)	$ (0.43)
Net loss - basic (in dollars per share)	$ (1.49)	$ (0.86)	$ (2.45)	$ (1.51)
Loss per common share — diluted
Continuing operations (in dollars per share)	$ (1.49)	$ (0.65)	$ (2.39)	$ (1.08)
Discontinued operations (in dollars per share)	$ 0.00	$ (0.21)	$ (0.06)	$ (0.43)
Net loss - diluted (dollars per share)	$ (1.49)	$ (0.86)	$ (2.45)	$ (1.51)
Anti-dilutive shares excluded from calculation (in shares)	4.4	5.9	4.5	6.3