Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Taxes
Income tax (expense) benefit	$ 0.0	$ 0.0
Unrecognized tax benefits	5.9
Unrecognized tax benefits that would impact effective tax rate	0.0
Unrecognized tax benefits expected to change significantly over the next twelve months	0.0
Accrued interest or penalties related to uncertain tax positions	$ 0.0