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Accrued Expenses (Tables)
 6 Months Ended
Jun. 30, 2020
Accrued Liabilities, Current [Abstract]  
Schedule of accrued expenses
Accrued expenses include the following (in millions):
June 30, 2020December 31, 2019
Accrued payables$1.9  $8.3  
Accrued compensation4.3  6.3  
Accrued taxes1.6  1.8  
Accrued insurance0.2  2.0  
Accrued expenses$8.0  $18.4