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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following:
(in millions)June 30,
2020
December 31, 2019
Raw materials$15.8  $14.1  
Work in process1.8  1.5  
Finished goods4.4  1.7  
Total inventories$22.0  $17.3