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

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

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- Definition

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

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- Definition

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

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- Definition

Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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- Definition

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

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Income Taxes - Income Tax from Continuing Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal									$ 11.2us-gaap_CurrentFederalTaxExpenseBenefit	$ 17.1us-gaap_CurrentFederalTaxExpenseBenefit	$ 4.3us-gaap_CurrentFederalTaxExpenseBenefit
State									2.8	2.1	0.8
Current									14.0us-gaap_CurrentIncomeTaxExpenseBenefit	19.2us-gaap_CurrentIncomeTaxExpenseBenefit	5.1us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal									(7.8)	(5.7)	(9.0)
State									(7.6)	(2.4)	(2.0)
Deferred									(15.4)us-gaap_DeferredOtherTaxExpenseBenefit	(8.1)us-gaap_DeferredOtherTaxExpenseBenefit	(11.0)us-gaap_DeferredOtherTaxExpenseBenefit
Total continuing operations tax expense (benefit)	$ 6.2us-gaap_IncomeTaxExpenseBenefit	$ (14.9)us-gaap_IncomeTaxExpenseBenefit	$ 6.5us-gaap_IncomeTaxExpenseBenefit	$ 0.8us-gaap_IncomeTaxExpenseBenefit	$ 8.5us-gaap_IncomeTaxExpenseBenefit	$ (0.3)us-gaap_IncomeTaxExpenseBenefit	$ 2.8us-gaap_IncomeTaxExpenseBenefit	$ 0.1us-gaap_IncomeTaxExpenseBenefit	$ (1.4)us-gaap_IncomeTaxExpenseBenefit	$ 11.1us-gaap_IncomeTaxExpenseBenefit	$ (5.9)us-gaap_IncomeTaxExpenseBenefit