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Restructuring charges - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 27, 2022
Mar. 28, 2021
Restructuring Cost and Reserve [Line Items]    
Restructuring charges $ 1.4 $ 1.4
Gas Cylinders segment    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 1.4 0.5
Elektron segment    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges $ 0.0 0.9
Asset impairment charges   $ 0.1