Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (loss)	$ (26.5)	$ (20.4)	$ (80.5)	$ (32.5)
Average shares of stock outstanding - basic and diluted	142,600,000	140,800,000	142,300,000	140,900,000
Net income (loss) per share - basic	$ (0.19)	$ (0.14)	$ (0.57)	$ (0.23)
Diluted earnings per share:
Antidilutive securities excluded from computation of earnings per share	4,700,000	3,800,000	5,000,000	2,500,000
Warrants outstanding	411,579		411,579