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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
$0.001 Par Value Common Stock
Additional Paid-In Capital
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Retained Earnings (Accumulated Deficit)
Beginning balance (in shares) at Dec. 31, 2021   55.1        
Beginning balance at Dec. 31, 2021 $ 1,611.5 $ 0.1 $ 829.4 $ (152.2) $ (16.1) $ 950.3
Beginning balance (in shares) at Dec. 31, 2021       (3.8)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (211.6)         (211.6)
Other comprehensive income (loss), net of tax 19.2       19.2  
Share-based compensation activity (in shares)   0.6        
Share-based compensation activity 44.1   44.1      
Repurchases of stock (in shares)       (1.8)    
Repurchases of common stock (75.5)     $ (75.5)    
Ending balance (in shares) at Dec. 31, 2022   55.7        
Ending balance at Dec. 31, 2022 1,387.7 $ 0.1 873.5 $ (227.7) 3.1 738.7
Ending balance (in shares) at Dec. 31, 2022       (5.6)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (760.5)         (760.5)
Other comprehensive income (loss), net of tax (8.8)       (8.8)  
Share-based compensation activity (in shares)   1.0        
Share-based compensation activity 22.5   22.5      
Issuance of common stock/At-the-market sale of stock, net of commissions and expenses (in shares)   1.1        
Issuance of common stock/At-the-market sale of stock, net of commissions and expenses $ 8.4   8.4      
Ending balance (in shares) at Dec. 31, 2023 57.8 57.8        
Ending balance at Dec. 31, 2023 $ 649.3 $ 0.1 904.4 $ (227.7) (5.7) (21.8)
Ending balance (in shares) at Dec. 31, 2023 (5.6)     (5.6)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss $ (190.6)         (190.6)
Other comprehensive income (loss), net of tax 0.5       0.5  
Share-based compensation activity (in shares)   1.0        
Share-based compensation activity 15.9   15.9      
Issuance of common stock/At-the-market sale of stock, net of commissions and expenses (in shares)   1.1        
Issuance of common stock/At-the-market sale of stock, net of commissions and expenses $ 7.7   7.7      
Ending balance (in shares) at Dec. 31, 2024 59.9 59.9        
Ending balance at Dec. 31, 2024 $ 482.8 $ 0.1 $ 928.0 $ (227.7) $ (5.2) $ (212.4)
Ending balance (in shares) at Dec. 31, 2024 (5.6)     (5.6)