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Employee Benefit Plans - Amounts Recognized in the Balance Sheet (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Noncurrent assets $ 1.7 $ 5.1
Liability, Defined Benefit Pension Plan, Current (5.8) (7.1)
Defined benefit pension plan, liabilities, noncurrent (74.7) (73.5)
Defined benefit plan, amounts recognized in balance sheet (78.8) (75.5)
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Noncurrent assets 0.0 0.0
Postemployment Benefits Liability, Current (18.9) (24.8)
Other postretirement defined benefit plan, liabilities, noncurrent (268.9) (304.8)
Other postretirement defined benefit plan, liabilities $ (287.8) $ (329.6)