Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]    
Additions charged to income tax provision $ (78.8) $ (130.8)
Uncertain tax positions (64.9)  
Income tax examination, interest 0.0 0.0
Income tax examination, penalties 0.0 0.0
Research and development    
Operating Loss Carryforwards [Line Items]    
Tax credits 37.3 $ 25.2
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 958.2  
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 1,200.0