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Discontinued Operations - Assets and Liabilities (Details) - USD ($) $ in Millions	Apr. 02, 2023	Dec. 31, 2022
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Current assets	$ 7.8	$ 9.3
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Held-for-sale liabilities	4.1	5.0
Discontinued operations | Superform Aluminum Superplastic
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Inventory	2.4	2.7
Accounts and other receivables	1.6	2.7
Current assets	4.0	5.4
Right-of-use-assets	2.6	2.7
Held-for-sale assets	6.6	8.1
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable	0.8	0.8
Accrued liabilities	0.4	0.2
Other liabilities	2.9	4.0
Held-for-sale liabilities	$ 4.1	$ 5.0

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