Divestitures - Schedule of Assets and Liabilities (Details) - Non-core operations in HPMC and AA&S Segment $ in Millions	Sep. 29, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	$ 19.2
Accounts receivable, net	6.1
Inventories, net	31.4
Prepaid expenses and other current assets	0.3
Total current assets	57.0
Property, plant and equipment, net	5.4
Other assets	6.5
Total long-term assets	11.9
Total Assets	68.9
Accounts payable	2.4
Other current liabilities	2.8
Total current liabilities	5.2
Other long-term liabilities	3.9
Total Liabilities	9.1
Net assets held for sale	$ 59.8