Income Taxes - Schedule of Classification of Deferred Tax Assets and Deferred Tax Liabilities in Consolidated Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets and deferred tax liabilities as presented in consolidated balance sheets
Current deferred tax assets, net	$ 71.7us-gaap_DeferredTaxAssetsNetCurrent	$ 63.3us-gaap_DeferredTaxAssetsNetCurrent
Current deferred tax liability, net		(1.4)us-gaap_DeferredTaxLiabilitiesCurrent
Long-term deferred tax assets, net	8.5us-gaap_DeferredTaxAssetsNetNoncurrent	10.3us-gaap_DeferredTaxAssetsNetNoncurrent
Long-term deferred tax liability, net	(78.6)	(48.9)
Net deferred tax assets	$ 1.6us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 23.3us-gaap_DeferredTaxAssetsLiabilitiesNet

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.

+ References+ Details

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

+ References+ Details

- Definition

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

+ References+ Details