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Schedule of Employee Benefit Plans Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost $ 0.3 $ 0.3
Interest cost 5.8 6.0
Expected asset return (7.2) (7.2)
Amortized loss (gain) 1.7 1.0
Net periodic benefit cost 0.6 0.1
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost 0.0 0.0
Interest cost 2.1 2.5
Amortized loss (gain) (2.5) (2.1)
Amortized prior service credit (0.1) (0.1)
Net periodic benefit cost (credit) $ (0.5) $ 0.3