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Discontinued Operations - Results of Discontinued Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 25, 2022
Sep. 26, 2021
Sep. 25, 2022
Sep. 26, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net loss $ (0.5) $ (0.7) $ (0.9) $ (2.8)
Discontinued Operations, Held-for-sale | Superform Aluminum Superplastic        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net sales 1.8 4.9 5.5 19.5
Cost of goods sold (1.7) (4.7) (4.9) (20.4)
Gross profit/(loss) 0.1 0.2 0.6 (0.9)
Selling, general and administrative expenses (0.1) (1.4) (0.5) (3.1)
Restructuring charges 0.0 0.0 (0.3) 0.0
Acquisition and disposal related costs (0.7) 0.0 (0.9) 0.0
Operating loss (0.7) (1.2) (1.1) (4.0)
Tax credit 0.2 0.5 0.2 1.2
Net loss $ (0.5) $ (0.7) $ (0.9) $ (2.8)