Statement of Consolidated Shareholders' Deficit - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, At Cost [Member]
Beginning balance at Dec. 31, 2014				$ 2,290.9	$ (2,240.0)	$ (432.8)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 11.7			1.4
Issuance of equity upon conversion of Series B Notes				18.5
Net income					4.4
Reclassification of net pension actuarial losses to net income, net of tax						8.0
Foreign currency translation adjustments						(3.2)
Ending balance at Jun. 30, 2015	$ (445.2)	$ 0.0	$ 0.3	$ 2,310.8	$ (2,235.6)	$ (428.0)	$ (92.7)