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Accounts Payable And Accrued Expenses (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Schedule Of Accounts Payble And Accrued Expenses [Line Items]    
Payables, trade and other $ 87.2 $ 91.0
Employment costs 9.0 33.6
Current portion of pension and postretirement liabilities 8.0 8.0
Other 26.9 27.3
Total accounts payable and accrued expenses $ 131.1 $ 159.9