Income Taxes - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred income tax assets	$ 6.9	$ 82.5
Deferred income tax liability	147.7	$ 10.9
Federal net operating loss carryforwards	848.5
Federal net operating loss carryforwards, deferred tax asset value	$ 178.2
Operating loss carryforwards, expiration period	2022
Domestic Country | Expire in 2022
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Federal net operating loss carryforwards	$ 55.8