Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Net deferred tax asset	$ 19.7
Valuation allowance	138.4
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss	367.0	$ 900.7
State
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 336.8