Statement of Consolidated Shareholders' Deficit (USD $) In Millions, unless otherwise specified	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, 2013		$ 0	$ 0.1	$ 1,964.4	$ (2,154.2)	$ (315.0)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of preferred stock		0.6
Issuance of common stock			0.1
Issuance of equity, net	250.0			249.3
Share-based compensation	11.1			8.5
Amortization of beneficial conversion feature on preferred stock	18.1			18.1	(18.1)
Conversion of preferred shares to common shares		(0.6)		0.6
Issuance of equity upon conversion of Series B Notes			0.1	64.7
Net loss					(73.9)
Reclassification of net pension actuarial losses to net loss, net of tax						5.8
Foreign currency translation adjustments						(1.9)
Equity issuance costs	(17.1)			(17.1)
Ending balance at Sep. 30, 2014	(361.2)	0	0.3	2,288.5	(2,246.2)	(311.1)	(92.7)
Beginning balance at Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of beneficial conversion feature on preferred stock	0
Reclassification of net pension actuarial losses to net loss, net of tax						1.9
Ending balance at Sep. 30, 2014	$ (361.2)					$ (311.1)	$ (92.7)