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Cash, Cash Equivalents and Restricted Cash (Schedule of Restricted Cash) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash included in other current assets $ 0.2 $ 0.2
Restricted cash included in other long-term assets 32.4 32.3
Other financial assurance [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash included in other current assets 0.2 0.2
Restricted cash included in other long-term assets 0.1 0.1
Workers compensation financial assurance [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash included in other current assets 0.0 0.0
Restricted cash included in other long-term assets 2.5 2.4
Collateral for Inventory Loan    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash included in other current assets 0.0 0.0
Restricted cash included in other long-term assets $ 29.8 $ 29.8