Statement Of Consolidated Shareholders' Deficit - USD ($) $ in Millions	Total	Common Stock:	Capital Surplus:	Accumulated Deficit:	Accumulated Other Comprehensive Loss:	Net actuarial gains (losses) and other adjustments	Net prior service credit	Settlement adjustment	Amortization of prior net losses	Amortization of prior net service credit	Foreign currency translation adjustments	Treasury Stock, At Cost:
Beginning balance at Dec. 31, 2015		$ 0.3	$ 2,312.6	$ (2,239.3)	$ (360.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation			6.6
Net income (loss)	$ 21.5			21.5
Change in other comprehensive income						$ (69.5)	$ 0.0	$ 0.0	$ 13.7	$ 0.0	$ 1.3
Reclassification of foreign currency translation gains to net income	(10.4)
Ending balance at Dec. 31, 2016	(416.2)	0.3	2,319.2	(2,217.8)	(425.2)							$ (92.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation			4.1
Net income (loss)	(10.8)			(10.8)
Change in other comprehensive income						36.1	8.9	6.3	12.9	0.0	5.2
Reclassification of foreign currency translation gains to net income	0.0
Ending balance at Dec. 31, 2017	(353.5)	0.3	2,323.3	(2,228.6)	(355.8)							(92.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation			4.3
Net income (loss)	20.2			20.2
Change in other comprehensive income						$ 1.0	$ 0.0	$ 10.9	$ 14.6	$ (0.4)	$ (2.6)
Reclassification of foreign currency translation gains to net income	0.0				0.0
Ending balance at Dec. 31, 2018	$ (305.5)	$ 0.3	$ 2,327.6	$ (2,208.4)	$ (332.3)							$ (92.7)