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Equity - Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Schedule of accumulated other comprehensive loss    
Balance at the beginning of the period $ (77.9)  
Other current-year change 9.0  
Balance at the end of the period (68.9)  
Deferred tax assets in accumulated other comprehensive loss, pension liabilities 3.3 $ 5.8
Income tax portion attributable to settlement of frozen defined benefit plan 3.4  
Foreign Currency Gain    
Schedule of accumulated other comprehensive loss    
Balance at the beginning of the period (52.7)  
Other current-year change (2.5)  
Balance at the end of the period (55.2)  
Pension and Postretirement Benefit Adjustments, Net of Tax    
Schedule of accumulated other comprehensive loss    
Balance at the beginning of the period (25.2)  
Other current-year change 11.5  
Balance at the end of the period $ (13.7)