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Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 28, 2021 | Mar. 29, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Net loss | $ (1.6) | $ (1.0)
Net gain on disposition | 7.5 | 0.0
Superform Aluminum Superplastic |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Cash consideration received | 21.0 |
Net assets sold | (11.5) |
Gross gain on disposition | 9.5 |
Tax expense | (2.0) |
Net gain on disposition | 7.5 |
Discontinued Operations | Superform Aluminum Superplastic |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Net sales | 9.7 | 15.4
Cost of goods sold | (10.1) | (15.0)
Gross profit | (0.4) | 0.4
Selling, general and administrative expenses | (1.4) | (1.4)
Operating loss | (1.8) | (1.0)
Tax credit | (0.2) | 0.0
Net loss | $ (1.6) | $ (1.0)

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