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Other Liabilities
 12 Months Ended
Dec. 31, 2020
Other Liabilities [Abstract]  
Other Liabilities Other Liabilities
(in millions) December 31,20202019
Environmental$29.4 $36.0 
Long-term lease liabilities86.5 91.5 
Other55.5 60.4 
Total$171.4 $187.9