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Retirement Benefit Plans - Schedule of Change in Benefit Obligations (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in benefit obligation:          
Actuarial (gains) losses $ (1.3) $ 22.3      
Pension Plan          
Change in benefit obligation:          
Actuarial (gains) losses     $ (0.7) $ 21.6 $ 16.0
U.S. Plans          
Change in benefit obligation:          
Service cost     0.7 0.8 6.9
Interest cost     17.1 17.9 17.7
U.S. Plans | Pension Plan          
Change in benefit obligation:          
Benefit obligation at beginning of year     333.2 335.3  
Service cost     0.7 0.8  
Interest cost     17.1 17.9  
Plan amendments     0.0 0.0  
Actuarial (gains) losses     (12.6) 10.8  
International plan exchange rate change     0.0 0.0  
Curtailments     0.0 0.0  
Benefits paid     (21.0) (31.6)  
Acquisitions     0.0 0.0  
Other     0.0 0.0  
Benefit obligation at end of year 317.4 333.2 317.4 333.2 335.3
International Plans          
Change in benefit obligation:          
Service cost     1.9 1.6 1.6
Interest cost     10.2 10.4 5.7
International Plans | Pension Plan          
Change in benefit obligation:          
Benefit obligation at beginning of year     242.3 218.1  
Service cost     1.9 1.6  
Interest cost     10.2 10.4  
Plan amendments     0.3 0.0  
Actuarial (gains) losses     (14.9) 10.8  
International plan exchange rate change     (6.9) 10.4  
Curtailments     (0.1) 0.0  
Benefits paid     (15.0) (14.7)  
Acquisitions     0.0 3.9  
Other     0.4 1.8  
Benefit obligation at end of year $ 218.2 $ 242.3 $ 218.2 $ 242.3 $ 218.1