Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 02, 2023	Jun. 26, 2022	Jul. 02, 2023	Jun. 26, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss	$ (0.2)	$ (0.3)	$ (0.2)	$ (0.4)
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	1.9	2.0	4.2	3.7
Cost of goods sold	(1.7)	(1.6)	(3.6)	(3.2)
Gross profit	0.2	0.4	0.6	0.5
Selling, general and administrative expenses	(0.4)	(0.2)	(0.7)	(0.4)
Restructuring charges	(0.1)	(0.3)	(0.2)	(0.3)
Acquisition and disposal related costs	0.0	(0.2)	0.0	(0.2)
Operating loss	(0.3)	(0.3)	(0.3)	(0.4)
Tax credit	0.1	0.0	0.1	0.0
Net loss	$ (0.2)	$ (0.3)	$ (0.2)	$ (0.4)

Disposal Group, Including Discontinued Operation, Acquisition And Disposal Related Cost

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Disposal Group, Including Discontinued Operation, Restructuring Expense

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Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.

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Amount of tax expense (benefit) attributable to income (loss) from operations classified as a discontinued operation. Excludes tax expense (benefit) for gain (loss) on disposal and for provision for gain (loss) until disposal.

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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