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Income Taxes - Schedule of Classification of Deferred Tax Assets and Deferred Tax Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Deferred tax assets and deferred tax liabilities as presented in consolidated balance sheets |  |
Long-term deferred tax assets, net | $ 14.3 | $ 8.9
Long-term deferred tax liability, net | (128.7) | (122.6)
Net deferred tax liabilities | $ (114.4) | $ (113.7)

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