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Consolidated Statements of Changes in Equity (unaudited) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Treasury Stock
Beginning balance at Dec. 31, 2024 $ 5,106.7 $ 0.5 $ 1,686.8 $ 4,378.3 $ (836.1) $ (122.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock plan exercises 7.6   7.6      
Stock plan compensation expense 15.1   15.1      
Common stock dividends (40.9)     (40.9)    
Acquisition of common stock (88.5)   (35.6) (52.9)    
Net income 146.6     146.6    
Other comprehensive (loss) income 87.6       87.6  
Ending balance at Mar. 31, 2025 5,234.2 0.5 1,673.9 4,431.1 (748.5) (122.8)
Beginning balance at Dec. 31, 2025 5,871.6 0.5 1,711.8 4,826.3 (544.2) (122.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock plan exercises 8.4   8.4      
Stock plan compensation expense 17.6   17.6      
Common stock dividends (44.0)     (44.0)    
Acquisition of common stock (173.5)   (66.4) (107.1)    
Net income 274.1     274.1    
Other comprehensive (loss) income (84.8)       (84.8)  
Ending balance at Mar. 31, 2026 $ 5,869.4 $ 0.5 $ 1,671.4 $ 4,949.3 $ (629.0) $ (122.8)