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Accounts Payable and Accrued Expenses
12 Months Ended
Dec. 31, 2024
Accounts Payable and Accrued Liabilities [Abstract]  
Accounts Payable and Accrued Expenses Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses consisted of the following at December 31 (in millions):
 20242023
Accounts payable$6.7 $8.6 
Accrued expenses25.6 24.9 
Accrued interest payable5.6 5.6 
Total accounts payable and accrued expenses$37.9 $39.1