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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Components of Inventories
The following table summarizes the components of Inventories:
(in millions)September 30,
2021
December 31,
2020
Finished goods$88.6 $95.3 
Raw materials108.4 76.6 
Work in process20.0 13.1 
Total inventories (a)
$217.0 $185.0 
(a)     Amounts at September 30, 2021 include inventories acquired in the OSW acquisition - see Note 2 – Acquisitions.