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	6 Months Ended					6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Jun. 30, 2014 Capital in Excess of Par Value [Member]	Dec. 31, 2013 Capital in Excess of Par Value [Member]	Jun. 30, 2014 Accumulated Deficit [Member]	Jun. 30, 2014 Foreign Currency Translation [Member]	Jun. 30, 2014 Benefit Plan Liabilities [Member]	Jun. 30, 2014 Unrealized Gain (Loss) on Available-For-Sale Investments [Member]	Jun. 30, 2014 Noncontrolling Interest [Member]	Jun. 30, 2014 Redeemable Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (144.5)	$ 0	$ 0	$ 64.7	$ 64.7	$ (16.8)	$ (18.3)	$ (174.9)	$ 3.3	$ (2.5)
Beginning Balance	1.3										1.3
Beginning Balance, shares	100	100	100
Net income (loss)	3.8					5.5				(1.7)
Net income (loss)											(0.1)
Foreign currency translation	(0.8)						(0.7)			(0.1)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax provision of $0.1	0.4							0.4
Unrealized loss on available-for-sale investment, net of tax benefit of $1.9	(3.3)								(3.3)
Ending Balance	(144.4)	0	0	64.7	64.7	(11.3)	(19.0)	(174.5)		(4.3)
Ending Balance	$ 1.2										$ 1.2
Ending Balance, shares	100	100	100