Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Income tax expense	$ (5.4)	$ 21.0
Income before income taxes and equity income of unconsolidated entity	$ (25.3)	$ 98.9
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward			$ 32.0