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Retirement and Postretirement Plans - Change in Plan Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Pension    
Change in plan assets:    
Fair value of plan assets at the beginning of year $ 1,176.0 $ 1,231.7
Actual return on plan assets (193.6) 44.6
Company contributions / payments 3.6 5.8
Benefits paid (65.7) (73.9)
Settlements (360.4) (31.1)
Foreign currency translation adjustment (10.5) (1.1)
Fair value of plan assets at end of year 549.4 1,176.0
Funded status at end of year (117.2) (143.2)
Pension | United States of America | Bargaining Plan    
Change in plan assets:    
Fair value of plan assets at the beginning of year 862.8 884.3
Actual return on plan assets (119.7) 35.0
Benefits paid (51.0) (56.5)
Settlements (338.2)  
Fair value of plan assets at end of year 353.9 862.8
Funded status at end of year (121.0) (162.6)
Pension | United States of America | Salaried Plan    
Change in plan assets:    
Fair value of plan assets at the beginning of year 205.7 243.3
Actual return on plan assets (35.9) 4.9
Benefits paid (11.6) (11.4)
Settlements (20.5) (31.1)
Fair value of plan assets at end of year 137.7 205.7
Funded status at end of year 9.6 18.3
Pension | United States of America | Supplemental Plan    
Change in plan assets:    
Company contributions / payments 2.3 3.0
Benefits paid (0.6) (3.0)
Settlements (1.7)  
Funded status at end of year (15.5) (23.6)
Pension | United Kingdom | Pension Scheme    
Change in plan assets:    
Fair value of plan assets at the beginning of year 107.2 103.8
Actual return on plan assets (38.0) 4.7
Company contributions / payments 1.3 2.8
Benefits paid (2.5) (3.0)
Foreign currency translation adjustment (10.5) (1.1)
Fair value of plan assets at end of year 57.5 107.2
Funded status at end of year 9.8 24.8
Pension | Mexico | Pension Plan    
Change in plan assets:    
Fair value of plan assets at the beginning of year 0.3 0.3
Fair value of plan assets at end of year 0.3 0.3
Funded status at end of year (0.1) (0.1)
Postretirement    
Change in plan assets:    
Fair value of plan assets at the beginning of year 76.8 82.2
Actual return on plan assets (8.8) 2.4
Company contributions / payments 2.1 1.1
Benefits paid (10.9) (8.9)
Fair value of plan assets at end of year 59.2 76.8
Funded status at end of year $ (28.2) $ (41.0)