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Pension and Other Post-retirement Benefits - Reconciliation of Fair Value Measurements Using Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at beginning of year $ 20.2  
Plan assets at end of year 18.5 $ 20.2
Private equity    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at beginning of year 2.4  
Relating to assets still held at the reporting date (0.6) 3.9
Relating to assets sold during the period (1.0) (3.6)
Purchases, sales and settlements 0.1 (0.3)
Plan assets at end of year 0.9 2.4
Significant Non- observable Inputs (Level 3)    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at beginning of year 2.4  
Plan assets at end of year 0.9 2.4
Significant Non- observable Inputs (Level 3) | Private equity    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at beginning of year 2.4 2.2
Transfers in and/or out   0.2
Plan assets at end of year $ 0.9 $ 2.4