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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2023   59.3        
Beginning balance at Dec. 31, 2023 $ 1,664.8 $ 0.6 $ (234.2) $ 2,223.4 $ (248.9) $ (76.1)
Treasury stock, beginning balance (in shares) at Dec. 31, 2023     (5.2)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (11.7)       (11.7)  
Other comprehensive (loss) income $ (2.6)         (2.6)
Treasury stock repurchases (in shares) (1.2)   (1.2)      
Treasury stock repurchases $ (44.3)   $ (44.3)      
Issuance of stock awards (in shares)   0.2        
Issuance of stock awards (3.8)     (3.8)    
Stock-based compensation 5.7     5.7    
Ending balance (in shares) at Mar. 31, 2024   59.5        
Ending balance at Mar. 31, 2024 $ 1,608.1 $ 0.6 $ (278.5) 2,225.3 (260.6) (78.7)
Treasury stock, ending balance (in shares) at Mar. 31, 2024     (6.4)      
Beginning balance (in shares) at Dec. 31, 2024 50.2 59.5        
Beginning balance at Dec. 31, 2024 $ 1,548.9 $ 0.6 $ (385.4) 2,238.4 (222.0) (82.7)
Treasury stock, beginning balance (in shares) at Dec. 31, 2024     (9.3)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (31.8)       (31.8)  
Other comprehensive (loss) income $ 0.2         0.2
Treasury stock repurchases (in shares) 0.0          
Issuance of stock awards (in shares)   0.2        
Issuance of stock awards $ (4.0)     (4.0)    
Stock-based compensation $ 5.6     5.6    
Ending balance (in shares) at Mar. 31, 2025 50.4 59.7        
Ending balance at Mar. 31, 2025 $ 1,518.9 $ 0.6 $ (385.4) $ 2,240.0 $ (253.8) $ (82.5)
Treasury stock, ending balance (in shares) at Mar. 31, 2025     (9.3)