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Accrued Expenses
12 Months Ended
Dec. 31, 2023
Payables and Accruals [Abstract]  
Accrued Expenses
10.Accrued Expenses
 As of December 31,
 20232022
 (in millions)
Salaries, wages and employee benefits$56.0 $51.6 
Interest4.2 4.4 
Environmental8.2 10.4 
Income taxes10.0 10.7 
Taxes other than income5.1 4.6 
Operating lease liability10.0 9.2 
Other26.1 29.3 
$119.6 $120.2