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Restructuring - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 26, 2021
Sep. 27, 2020
Sep. 26, 2021
Sep. 27, 2020
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 0.5 $ 4.2 $ 2.1 $ 7.8
Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0.5 4.2 2.1 7.8
Severance and related costs   4.2   7.8
Gas Cylinders        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0.3 3.3 1.0 6.5
Gas Cylinders | Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Severance and related costs 0.5 3.3 1.1 6.7
Elektron | One-time Termination Benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     0.9  
Elektron | Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Severance and related costs $ 0.0 0.9 $ 1.0 1.0
Elektron | COVID-19 Restructuring, Fixed Cost Reduction        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   $ 0.9   $ 1.3