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Accrued Expenses
9 Months Ended
Sep. 30, 2023
Payables and Accruals [Abstract]  
Accrued Expenses Accrued Expenses
September 30,
2023
December 31,
2022
 (in millions)
Salaries, wages and employee benefits$50.1 $51.6 
Interest9.2 4.4 
Environmental12.0 10.4 
Income taxes10.4 10.7 
Taxes other than income taxes6.2 4.6 
Operating lease liabilities10.0 9.2 
Other25.5 29.3 
$123.4 $120.2