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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock, Common
Total stockholders' equity, Beginning of Period at Dec. 31, 2020 $ 921.5 $ 0.9 $ 837.9 $ 750.3 $ (208.4) $ (459.2)
Shares oustanding, Beginning of Period (in shares) at Dec. 31, 2020   68.6        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 220.9     220.9    
Other comprehensive income (loss) – net of tax (20.1)       (20.1)  
Issuance of common stock related to compensation 12.2   12.2      
Issuance of common stock related to compensation (in shares)   0.6        
Compensation under stock-based plans – net 12.2   9.3     2.9
Compensation under stock-based plans – net (in shares)   0.1        
Dividends (33.5)   0.6 (34.1)    
Acquisition of treasury stock (in shares)   (0.1)        
Acquisition of treasury stock (3.3)         (3.3)
Other (0.3)     (0.2)   (0.1)
Shares outstanding, End of Period (in shares) at Dec. 31, 2021   69.2        
Total stockholders' equity, End of Period at Dec. 31, 2021 1,109.6 $ 0.9 860.0 936.9 (228.5) (459.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 300.0     300.0    
Other comprehensive income (loss) – net of tax (113.1)       (113.1)  
Issuance of common stock related to compensation 18.7   18.7      
Issuance of common stock related to compensation (in shares)   0.6        
Compensation under stock-based plans – net 3.3   2.3     1.0
Dividends (35.6)   0.6 (36.2)    
Acquisition of treasury stock (in shares)   (3.0)        
Acquisition of treasury stock (101.6)         (101.6)
Other (0.1)     (0.1)    
Shares outstanding, End of Period (in shares) at Dec. 31, 2022   66.8        
Total stockholders' equity, End of Period at Dec. 31, 2022 1,181.2 $ 0.9 881.6 1,200.6 (341.6) (560.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 518.0     518.0    
Other comprehensive income (loss) – net of tax 54.5       54.5  
Issuance of common stock related to compensation 10.4   10.4      
Issuance of common stock related to compensation (in shares)   0.6        
Compensation under stock-based plans – net 14.8   13.4     1.4
Dividends (43.1)   0.7 (43.8)    
Acquisition of treasury stock (in shares)   (1.3)        
Acquisition of treasury stock (63.3)         (63.3)
Other (0.2)         (0.2)
Shares outstanding, End of Period (in shares) at Dec. 31, 2023   66.1        
Total stockholders' equity, End of Period at Dec. 31, 2023 $ 1,672.3 $ 0.9 $ 906.1 $ 1,674.8 $ (287.1) $ (622.4)