Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ (86.0)	$ (73.4)	$ 177.4
Loss from discontinued operations	(2.1)	(2.0)	(0.3)
Net income (loss)	(88.1)	(75.4)	177.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (88.1)	$ (75.4)	$ 177.1
Weighted average number of shares outstanding - basic	142.4	141.1	139.6
Dilutive effect of employee stock plans	0.0	0.0	2.5
Dilutive effect of stock warrants	0.0	0.0	2.2
Earnings per share, potentially dilutive	0	0	4.7
Weighted Average Number Diluted Shares Outstanding Adjustment	142.4	141.1	144.3
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4.9	5.8	2.5
Income (loss) per share from continuing operations	$ (0.60)	$ (0.52)	$ 1.27
Loss per share from discontinued operations	(0.02)	(0.01)	0.00
Earnings Per Share, Basic	(0.62)	(0.53)	1.27
Income (loss) per share from continuing operations	(0.60)	(0.52)	1.23
Loss per share from discontinued operations	(0.02)	(0.01)	0.00
Net income (loss) per share - diluted	$ (0.62)	$ (0.53)	$ 1.23