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Segment Information - Financial Information by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 26, 2021
Jun. 27, 2021
Mar. 28, 2021
Dec. 31, 2020
Sep. 27, 2020
Jun. 28, 2020
Mar. 29, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]                      
Net Sales $ 98.7 $ 91.2 $ 99.0 $ 85.2 $ 82.1 $ 77.7 $ 76.6 $ 88.4 $ 374.1 $ 324.8 $ 373.4
Adjusted EBITDA                 63.4 53.9 67.1
Depreciation and amortization                 15.6 13.3 13.2
Restructuring charges                 6.2 8.9 25.9
Total assets 368.8       346.4       368.8 346.4  
Capital expenditure                 9.0 7.4 14.8
Discontinued operations                      
Segment Reporting Information [Line Items]                      
Total assets 4.8       32.3       4.8 32.3  
Capital expenditure                 0.1 0.3 0.8
Other segment                      
Segment Reporting Information [Line Items]                      
Depreciation and amortization                 0.0 0.0 0.0
Restructuring charges                 0.0 0.1 0.0
Total assets 34.8       24.7       34.8 24.7  
Capital expenditure                 0.0 0.0 0.0
Intersegment Eliminations                      
Segment Reporting Information [Line Items]                      
Net Sales                 0.0 0.4 0.4
Gas Cylinders Segment                      
Segment Reporting Information [Line Items]                      
Net Sales                 178.3 141.9 153.5
Gas Cylinders Segment | Operating Segments                      
Segment Reporting Information [Line Items]                      
Net Sales                 178.3 141.9 153.5
Adjusted EBITDA                 22.7 21.3 22.3
Depreciation and amortization                 5.8 3.7 3.6
Restructuring charges                 5.3 7.9 20.7
Total assets 122.7       99.7       122.7 99.7  
Capital expenditure                 1.0 2.0 3.1
Elektron Segment                      
Segment Reporting Information [Line Items]                      
Net Sales                 195.8 182.9 219.9
Elektron Segment | Operating Segments                      
Segment Reporting Information [Line Items]                      
Net Sales                 195.8 182.9 219.9
Adjusted EBITDA                 40.7 32.6 44.8
Depreciation and amortization                 9.8 9.6 9.6
Restructuring charges                 0.9 0.9 5.2
Total assets $ 206.5       $ 189.7       206.5 189.7  
Capital expenditure                 $ 7.9 $ 5.1 $ 10.9