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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure Text Block Supplement [Abstract]  
Schedule of other assets
   December 31,
2020		   December 31,
2019		 
   (in millions) 
Long term finance lease receivable  $0.6   $1.0 
Long term receivables   1.4    1.5 
Long term prepaid expenses and other assets   1.3    2.6 
   $3.3   $5.1