Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income and Redeemable Noncontrolling Interest - Change In Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income and Redeemable Noncontrolling Interest (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended						9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Sep. 30, 2013 Capital in Excess of Par Value [Member]	Dec. 31, 2012 Capital in Excess of Par Value [Member]	Sep. 30, 2013 Accumulated Deficit [Member]	Sep. 30, 2013 Foreign Currency Translation [Member]	Sep. 30, 2013 Benefit Plan Liabilities [Member]	Sep. 30, 2013 Unrealized Gain (Loss) on Available- For-Sale Investments [Member]	Sep. 30, 2013 Noncontrolling Interest [Member]	Sep. 30, 2013 Redeemable Noncontrolling Interest [Member]
Schedule of Capitalization, Equity [Line Items]
Beginning Balance			$ (282.2)				$ 71.3	$ 71.3	$ (102.5)	$ (5.4)	$ (251.6)	$ 3.3	$ 2.7
Beginning Balance			1.7											1.7
Beginning Balance, shares			100		100	100
Net income (loss)	3.3	31.6	8.4	98.1					13.3				(4.8)
Net income (loss)														(0.1)
Net income (loss) excluding portion attributable to noncontrolling interest			8.5
Foreign currency translation			(6.5)							(6.8)			0.3	(0.3)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax provision			3.5								3.5
Unrealized gain on available-for-sale investment			1.8									1.8
Ending Balance	(274.9)		(274.9)				71.3	71.3	(89.2)	(12.2)	(248.1)	5.1	(1.8)
Ending Balance	$ 1.3		$ 1.3											$ 1.3
Ending Balance, shares	100		100		100	100