Income Taxes - Schedule of Classification of Deferred Tax Assets and Deferred Tax Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets and deferred tax liabilities as presented in consolidated balance sheets
Long-term deferred tax assets, net	$ 72.9	$ 21.8
Long-term deferred tax liability, net	(153.0)	(155.7)
Net deferred tax liabilities	$ (80.1)	$ (133.9)