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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
$0.001 Par Value Common Stock
Treasury Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022   55.7        
Beginning balance at Dec. 31, 2022 $ 1,387.7 $ 0.1 $ (227.7) $ 873.5 $ 3.1 $ 738.7
Beginning balance (in shares) at Dec. 31, 2022     (5.6)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) (186.2)         (186.2)
Share-based compensation activity (in shares)   0.3        
Share-based compensation activity 4.7     4.7    
Other comprehensive income, net of tax (2.1)       (2.1)  
Ending balance (in shares) at Mar. 31, 2023   56.0        
Ending balance at Mar. 31, 2023 $ 1,204.1 $ 0.1 $ (227.7) 878.2 1.0 552.5
Ending balance (in shares) at Mar. 31, 2023     (5.6)      
Beginning balance (in shares) at Dec. 31, 2023 57.8 57.8        
Beginning balance at Dec. 31, 2023 $ 649.3 $ 0.1 $ (227.7) 904.4 (5.7) (21.8)
Beginning balance (in shares) at Dec. 31, 2023 (5.6)   (5.6)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) $ 9.0         9.0
Share-based compensation activity (in shares)   0.2        
Share-based compensation activity 5.4     5.4    
Other comprehensive income, net of tax $ 0.2       0.2  
Ending balance (in shares) at Mar. 31, 2024 58.0 58.0        
Ending balance at Mar. 31, 2024 $ 663.9 $ 0.1 $ (227.7) $ 909.8 $ (5.5) $ (12.8)
Ending balance (in shares) at Mar. 31, 2024 (5.6)   (5.6)