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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Examination [Line Items]      
Income tax expense (benefit) $ 0.3 $ (19.0)  
Valuation allowance, deferred tax asset, increase (decrease), amount 123.6   $ (3.5)
Tax benefit related to the CVR liability 108.8    
Operating loss carryforwards, not subject to expiration 74.4    
Operating loss carryforwards, subject to expiration 113.4    
Capitalized research and experimental costs, tax purposes 45.1 $ 43.9  
Federal      
Income Tax Examination [Line Items]      
Operating loss carryforwards 152.6    
Tax credit carryforward, amount 5.2    
State      
Income Tax Examination [Line Items]      
Operating loss carryforwards 187.8    
Tax credit carryforward, amount $ 1.0