v3.26.3
Equity (Components of Shareholders' Equity Rollforward) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Beginning balance $ 2,118.6 $ 2,101.2 $ 2,067.6 $ 1,786.5 $ 1,606.9 $ 1,500.7 $ 2,067.6 $ 1,500.7
Net earnings 220.9 184.6 138.1 188.4 159.7 148.2 543.6 496.3
Other comprehensive income (loss), net of tax (7.6) (6.7) (21.9) (10.1) 90.7 36.6    
Repurchase of ordinary shares (119.8) (120.0) (40.6)   (40.0) (40.0) (280.3) (80.0)
Share-based compensation activity 6.8 6.3 5.4 25.6 13.0 5.4    
Dividends to ordinary shareholders ($0.55 per share) (46.5) (46.8) (47.4) (43.8) (43.8) (44.0)    
Ending balance $ 2,172.4 $ 2,118.6 2,101.2 $ 1,946.6 $ 1,786.5 1,606.9 2,172.4 1,946.6
Dividends per share (in dollars per share) $ 0.55 $ 0.55   $ 0.51 $ 0.51      
Ordinary shares                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Beginning balance $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9
Beginning balance (in shares) 85.1 85.9 86.1 85.8 86.1 86.3 86.1 86.3
Treasury Stock, Value, Acquired, Par Value Method $ (0.1)              
Repurchase of ordinary shares (in shares) (0.8) (0.9) (0.3)   (0.3) (0.3)    
Share-based compensation activity, shares (in shares) 0.0 0.1 0.1 0.2 0.0 0.1    
Ending balance $ 0.8 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.9 $ 0.8 $ 0.9
Ending balance (in shares) 84.3 85.1 85.9 86.0 85.8 86.1 84.3 86.0
Capital in excess of par value                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Beginning balance $ 0.0 $ 0.0 $ 34.2 $ 0.0 $ 0.0 $ 0.0 $ 34.2 $ 0.0
Repurchase of ordinary shares (6.8) (6.3) (39.6)   (13.0) (5.4)    
Share-based compensation activity 6.8 6.3 5.4 25.6 13.0 5.4    
Ending balance 0.0 0.0 0.0 25.6 0.0 0.0 0.0 25.6
Retained earnings                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Beginning balance 2,351.9 2,327.8 2,238.1 1,989.9 1,901.0 1,831.4 2,238.1 1,831.4
Net earnings 220.9 184.6 138.1 188.4 159.7 148.2    
Repurchase of ordinary shares (112.9) (113.7) (1.0)   (27.0) (34.6)    
Dividends to ordinary shareholders ($0.55 per share) (46.5) (46.8) (47.4) (43.8) (43.8) (44.0)    
Ending balance 2,413.4 2,351.9 2,327.8 2,134.5 1,989.9 1,901.0 2,413.4 2,134.5
Accumulated other comprehensive loss                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Beginning balance (234.2) (227.5) (205.6) (204.3) (295.0) (331.6) (205.6) (331.6)
Other comprehensive income (loss), net of tax (7.6) (6.7) (21.9) (10.1) 90.7 36.6    
Ending balance $ (241.8) $ (234.2) $ (227.5) $ (214.4) $ (204.3) $ (295.0) $ (241.8) $ (214.4)