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Unusual Items - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 29, 2019
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Unusual or Infrequent Item [Line Items]            
Legal related matter   $ 0.0 $ 1.8 $ 0.0 $ 1.8 $ 0.0
Acquisition costs   $ 0.0   $ 0.0 $ 0.0 $ 0.3
3D Material Technologies            
Unusual or Infrequent Item [Line Items]            
Acquisition costs $ 0.3