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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)

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