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Retirement and Postretirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost $ 9.2 $ 10.4 $ 14.2
Interest cost 31.1 35.8 39.6
Expected return on plan assets (33.5) (37.1) (54.9)
Amortization of prior service cost 1.2 1.3 1.3
Settlements 0.0 0.0  
Curtailments     (2.7)
Net remeasurement losses (gains) 10.4 38.7 (20.9)
Net Periodic Benefit Cost (Income) 18.4 49.1 (23.4)
Pension | United States of America | Bargaining Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 8.9 9.5 13.9
Interest cost 25.4 25.9 31.1
Expected return on plan assets (28.0) (26.9) (46.7)
Amortization of prior service cost 1.2 1.3 1.3
Settlements 0.0 0.0  
Curtailments     (2.7)
Net remeasurement losses (gains) 8.3 26.6 (37.2)
Net Periodic Benefit Cost (Income) 15.8 36.4 (40.3)
Pension | United States of America | Salaried Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 0.3 0.9 0.3
Interest cost 2.3 6.7 6.5
Expected return on plan assets (2.4) (7.5) (5.0)
Curtailments     0.0
Net remeasurement losses (gains) 1.8 4.0 6.9
Net Periodic Benefit Cost (Income) 2.0 4.1 8.7
Pension | United States of America | Supplemental Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 0.0    
Interest cost 0.9 0.9 0.7
Curtailments     0.0
Net remeasurement losses (gains) (0.7) 0.6 (6.5)
Net Periodic Benefit Cost (Income) 0.2 1.5 (5.8)
Pension | United Kingdom | Pension Scheme      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 0.0    
Interest cost 2.5 2.3 1.3
Expected return on plan assets (3.1) (2.7) (3.2)
Net remeasurement losses (gains) 1.4 7.5 15.9
Net Periodic Benefit Cost (Income) 0.8 7.1 14.0
Pension | Mexico | Pension Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net remeasurement losses (gains) (0.4)   0.0
Net Periodic Benefit Cost (Income) (0.4)   0.0
Postretirement      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 0.6 0.7 1.1
Interest cost 4.3 4.7 3.4
Expected return on plan assets (2.9) (3.4) (3.4)
Amortization of prior service cost (5.9) (6.0) (6.0)
Net remeasurement losses (gains) (0.1) 1.9 (11.8)
Net Periodic Benefit Cost (Income) $ (4.0) $ (2.1) $ (16.7)