Basic and Diluted Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net loss
Net loss from continuing operations	$ (45.0)	$ (12.3)
Net loss from discontinued operations	0	(0.9)
Net loss	$ (45.0)	$ (13.2)
Weighted average number of shares used in per share calculations:
Basic shares	84.3	84.6
Diluted shares	84.3	84.6
Basic net loss per share:
Continuing operations	$ (0.53)	$ (0.15)
Discontinued operations	$ 0.00	$ (0.01)
Total basic net loss per share	$ (0.53)	$ (0.16)
Continuing operations	$ (0.53)	$ (0.15)
Discontinued operations	$ 0.00	$ (0.01)
Total diluted net loss per share	$ (0.53)	$ (0.16)