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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net loss
Net loss from continuing operations	$ (69.8)	$ (0.4)	$ (187.2)	$ (25.1)
Net loss from discontinued operations	0	(0.1)	0	(1.6)
Net loss	$ (69.8)	$ (0.5)	$ (187.2)	$ (26.7)
Weighted average number of shares used in per share calculations:
Basic shares	84.7	85.1	84.5	84.9
Diluted shares	84.7	85.1	84.5	84.9
Basic net loss per share:
Continuing operations	$ (0.82)	$ (0.01)	$ (2.22)	$ (0.29)
Discontinued operations	$ 0	$ 0.00	$ 0.00	$ (0.02)
Total basic net loss per share	$ (0.82)	$ (0.01)	$ (2.22)	$ (0.31)
Continuing operations	$ (0.82)	$ (0.01)	$ (2.22)	$ (0.29)
Discontinued operations	$ 0	$ 0.00	$ 0.00	$ (0.02)
Total diluted net loss per share	$ (0.82)	$ (0.01)	$ (2.22)	$ (0.31)