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Restructuring - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Restructuring Cost and Reserve [Line Items]    
Restructuring charges $ 1.4 $ 2.8
Gas Cylinders segment    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 0.5 2.6
Elektron segment    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 0.9 $ 0.0
Asset impairment charges $ 0.1