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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Beginning balance at Dec. 31, 2021 $ 1,825.2 $ 0.3 $ 325.8 $ 2,345.9 $ (156.2) $ (690.4)
Beginning Balance (in shares) at Dec. 31, 2021   25,336,054        
Increase (Decrease) in Stockholders' Equity            
Net income 398.9     398.9    
Other comprehensive income (loss), net of taxes 28.0       28.0  
Purchases of treasury stock, including excise tax (254.1)         (254.1)
Net issuance of treasury shares to stock compensation plans 3.7   (9.0)     12.7
Net issuance of treasury shares to stock compensation plans and other (in shares)   (77,310)        
Stock-based compensation 15.0   15.0      
Dividends declared (12.2)     (12.2)    
Ending balance at Jun. 30, 2022 2,004.5 $ 0.3 331.8 2,732.5 (128.3) (931.8)
Ending Balance (in shares) at Jun. 30, 2022   25,258,744        
Beginning balance at Mar. 31, 2022 1,949.2 $ 0.3 324.2 2,542.7 (120.6) (797.3)
Beginning Balance (in shares) at Mar. 31, 2022   25,266,915        
Increase (Decrease) in Stockholders' Equity            
Net income 195.9     195.9    
Other comprehensive income (loss), net of taxes (7.7)       (7.7)  
Purchases of treasury stock, including excise tax (138.9)         (138.9)
Net issuance of treasury shares to stock compensation plans 5.0   0.6     4.4
Net issuance of treasury shares to stock compensation plans and other (in shares)   (8,171)        
Stock-based compensation 7.0   7.0      
Dividends declared (6.1)     (6.1)    
Ending balance at Jun. 30, 2022 2,004.5 $ 0.3 331.8 2,732.5 (128.3) (931.8)
Ending Balance (in shares) at Jun. 30, 2022   25,258,744        
Beginning balance at Dec. 31, 2022 2,237.5 $ 0.3 338.7 3,073.6 22.5 (1,197.5)
Beginning Balance (in shares) at Dec. 31, 2022   25,232,620        
Increase (Decrease) in Stockholders' Equity            
Net income 329.0     329.0    
Other comprehensive income (loss), net of taxes 18.1       18.1  
Purchases of treasury stock, including excise tax (66.5)         (66.5)
Net issuance of treasury shares to stock compensation plans 3.1   (9.4)     12.5
Net issuance of treasury shares to stock compensation plans and other (in shares)   (68,454)        
Stock-based compensation 10.5   10.5      
Dividends declared (12.8)     (12.8)    
Ending balance at Jun. 30, 2023 2,518.9 $ 0.3 339.8 3,389.7 40.6 (1,251.5)
Ending Balance (in shares) at Jun. 30, 2023   25,164,166        
Beginning balance at Mar. 31, 2023 2,352.5 $ 0.3 333.6 3,225.5 16.7 (1,223.7)
Beginning Balance (in shares) at Mar. 31, 2023   25,150,165        
Increase (Decrease) in Stockholders' Equity            
Net income 170.5     170.5    
Other comprehensive income (loss), net of taxes 23.8       23.8  
Purchases of treasury stock, including excise tax (31.6)         (31.6)
Net issuance of treasury shares to stock compensation plans 5.2   1.5     3.7
Net issuance of treasury shares to stock compensation plans and other (in shares)   14,001        
Stock-based compensation 4.8   4.8      
Dividends declared (6.4)     (6.4)    
Ending balance at Jun. 30, 2023 $ 2,518.9 $ 0.3 $ 339.8 $ 3,389.7 $ 40.6 $ (1,251.5)
Ending Balance (in shares) at Jun. 30, 2023   25,164,166