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Income Taxes - Components of Income Tax Expense (Benefit) From Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal, Current	$ 50.1us-gaap_CurrentFederalTaxExpenseBenefit	$ (15.1)us-gaap_CurrentFederalTaxExpenseBenefit	$ 8.6us-gaap_CurrentFederalTaxExpenseBenefit
Federal, Deferred	(64.3)	(23.9)	(55.5)
State, Current	13.9	(4.8)	10.5
State, Deferred	(3.8)	(2.6)	(18.3)
Foreign, Current	49.3us-gaap_CurrentForeignTaxExpenseBenefit	51.8us-gaap_CurrentForeignTaxExpenseBenefit	46.5us-gaap_CurrentForeignTaxExpenseBenefit
Foreign, Deferred	(18.9)	(14.6)	21.8
Total	$ 26.3us-gaap_IncomeTaxExpenseBenefit	$ (9.2)us-gaap_IncomeTaxExpenseBenefit	$ 13.6us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.