Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income and Redeemable Noncontrolling Interest - Change In Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income and Redeemable Noncontrolling Interest (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Schedule of Capitalization, Equity [Line Items]
Changes in defined benefit pension and other post-retirement benefit plans, tax provision	$ 0.4
Benefit Plan Liabilities [Member]
Schedule of Capitalization, Equity [Line Items]
Changes in defined benefit pension and other post-retirement benefit plans, tax provision	$ 0.4