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v3.21.2

Discontinued Operations - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 27, 2021 USD ($) building | Mar. 28, 2021 USD ($) | Jun. 28, 2020 USD ($) | Jun. 27, 2021 USD ($) building | Jun. 28, 2020 USD ($) | Dec. 31, 2020 USD ($) building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain on disposition of discontinued operations | $ (0.4) |  | $ 0.0 | $ 7.1 | $ 0.0 |
Held-for-sale | Building | Elektron |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Number of properties to be disposed | building | 1 |  |  | 1 |  | 1
Amount of property disposed | $ 3.7 |  |  | $ 3.7 |  | $ 3.7
Superform Aluminum Superplastic |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Consideration of disposal | 20.6 | $ 21.0 |  | 20.6 |  |
Superform Aluminum Superplastic | Discontinued Operations, Held-for-sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain on disposition of discontinued operations | 7.1 | 7.5 |  |  |  |
Tax charge |  | $ 2.0 |  |  |  |
Working capital adjustment | 0.4 |  |  |  |  |
Superform Aluminum Superplastic | Held-for-sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Amount of property disposed | $ 5.1 |  |  | $ 5.1 |  | $ 11.6

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