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Other Comprehensive Income - Components of Accumulated Comprehensive Loss (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive loss, net of tax $ 694.5 $ 701.4 $ 682.2 $ 653.0 $ 652.9 $ 649.6
Accumulated other comprehensive loss, net of tax            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive loss, net of tax (96.5) $ (88.3) (119.0) $ (106.3) $ (115.7) $ (111.9)
Pension and OPEB liability adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive loss, tax benefit 8.0   8.9      
Accumulated other comprehensive loss, net of tax (12.5)   (14.4)      
Derivative instrument adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive loss, tax benefit (1.1)   2.1      
Accumulated other comprehensive loss, net of tax 29.8   (1.9)      
Unrealized foreign currency adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated other comprehensive loss, tax benefit 26.0   9.5      
Accumulated other comprehensive loss, net of tax $ (113.8)   $ (102.7)