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
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)