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Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Income Taxes
Deferred tax asset, current	$ 24.1us-gaap_DeferredTaxAssetsNetCurrent	$ 24.1us-gaap_DeferredTaxAssetsNetCurrent
Deferred Tax Liabilities, Net, Noncurrent	$ 96.0	$ 101.9

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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