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Discontinued Operations - Results of Discontinued Operations (Details) - Discontinued Operations, Held-for-sale - Superform Aluminum Superplastic - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Apr. 02, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Net sales | $ 1.5 | $ 2.3
Cost of goods sold | (1.1) | (1.9)
Gross profit | 0.4 | 0.4
Selling, general and administrative expenses | (0.4) | (0.3)
Restructuring charges | (0.1) | (0.1)
Operating (loss) / profit | (0.1) | 0.0
Tax credit / (charge) | 0.0 | 0.0
Net (loss) / profit | $ (0.1) | $ 0.0

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