Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Feb. 19, 2021
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (18.0)	$ 5.0
Income before income taxes and equity income of unconsolidated entity	80.0	$ (25.0)
Discrete tax benefit for release of valuation allowance on deferred tax assets	$ (1.0)
Decrease in deferred tax liability			$ 58.0