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Other (expense), net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Intercompany Foreign Currency Balance [Line Items]      
Postretirement expense $ (387.1) $ (43.2) $ (548.6)
Foreign exchange losses (0.2) (6.8) (2.5)
Environmental costs and other, net (6.6) (32.4) (29.2)
Total other (expense), net (393.9) (82.4) (580.3)
Foreign currency (gains) losses 1.0 47.4 22.8
Foreign currency (gains) losses related to exiting foreign countries      
Intercompany Foreign Currency Balance [Line Items]      
Foreign currency (gains) losses (3.7) $ 2.9 4.0
Pension Plans      
Intercompany Foreign Currency Balance [Line Items]      
Settlement losses $ 348.9   $ 499.4