Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income and Redeemable Noncontrolling Interest - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ 4.5	$ 6.0
Tax provision	(3.5)	(1.1)
Net of tax	1.0	4.9
Benefit Plan Liabilities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0.2	1.2
Tax provision		0.1
Net of tax	0.2	1.1
Benefit Plan Liabilities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Operating Expense [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial loss	0.6	1.6
Prior service credit	$ (0.4)	$ (0.4)