v3.25.2
Equity (Components of Shareholders' Equity Rollforward) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 1,606.9 $ 1,500.7 $ 1,350.9 $ 1,318.3 $ 1,500.7 $ 1,318.3
Net earnings 159.7 148.2 155.4 123.8 307.9 279.2
Other comprehensive income (loss), net of tax 90.7 36.6 (5.1) (24.0)    
Repurchase of ordinary shares (40.0) (40.0) (40.0)   (80.0) (80.0)
Share-based compensation activity 13.0 5.4 5.9 14.8    
Dividends to ordinary shareholders ($0.51 per share) (43.8) (44.0) (41.8) (42.0)    
Ending balance $ 1,786.5 $ 1,606.9 $ 1,425.3 $ 1,350.9 1,786.5 1,425.3
Dividends per share (in dollars per share) $ 0.51 $ 0.51 $ 0.48 $ 0.48    
Ordinary shares            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9
Beginning balance (in shares) 86.1 86.3 87.4 87.5 86.3 87.5
Repurchase of ordinary shares   $ 0.0        
Repurchase of ordinary shares (in shares) (0.3) (0.3) (0.3) (0.3)    
Share-based compensation activity          
Share-based compensation activity, shares (in shares) 0.0 0.1   0.2    
Ending balance $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9
Ending balance (in shares) 85.8 86.1 87.1 87.4 85.8 87.1
Capital in excess of par value            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance   $ 0.0 $ 0.0 $ 0.0
Repurchase of ordinary shares $ (13.0) (5.4) (4.1) (14.8)    
Share-based compensation activity 13.0 5.4 5.9 14.8    
Ending balance 0.0   1.8 0.0 0.0 1.8
Retained earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 1,901.0 1,831.4 1,635.5 1,578.9 1,831.4 1,578.9
Net earnings 159.7 148.2 155.4 123.8    
Repurchase of ordinary shares (27.0) (34.6) (35.9) (25.2)    
Dividends to ordinary shareholders ($0.51 per share) (43.8) (44.0) (41.8) (42.0)    
Ending balance 1,989.9 1,901.0 1,713.2 1,635.5 1,989.9 1,713.2
Accumulated other comprehensive loss            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (295.0) (331.6) (285.5) (261.5) (331.6) (261.5)
Other comprehensive income (loss), net of tax 90.7 36.6 (5.1) (24.0)    
Ending balance $ (204.3) $ (295.0) $ (290.6) $ (285.5) $ (204.3) $ (290.6)