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Restructuring - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 27, 2021
Jun. 28, 2020
Jun. 27, 2021
Jun. 28, 2020
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 0.2 $ 0.8 $ 1.6 $ 3.6
Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0.2 0.8 1.6 3.6
Severance and related costs   0.8    
COVID-19 Restructuring, Fixed Cost Reduction        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   0.2    
Gas Cylinders        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0.2 0.6 0.7  
Gas Cylinders | Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Severance and related costs 0.2 0.8 0.7 3.4
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 $ 0.1 $ 0.9 $ 0.1