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Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 26, 2022 | Jun. 27, 2021 | Jun. 26, 2022 | Jun. 27, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net loss | $ (0.3) | $ (0.5) | $ (0.4) | $ (2.1)
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 | 2.0 | 4.9 | 3.7 | 14.6
Cost of goods sold | (1.6) | (5.6) | (3.2) | (15.7)
Gross profit/(loss) | 0.4 | (0.7) | 0.5 | (1.1)
Selling, general and administrative expenses | (0.2) | (0.3) | (0.4) | (1.7)
Restructuring charges | (0.3) | 0.0 | (0.3) | 0.0
Acquisition and disposal related costs | (0.2) | 0.0 | (0.2) | 0.0
Operating loss | (0.3) | (1.0) | (0.4) | (2.8)
Tax credit | 0.0 | 0.5 | 0.0 | 0.7
Net loss | $ (0.3) | $ (0.5) | $ (0.4) | $ (2.1)

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