Divestitures - Schedule of Assets and Liabilities (Details) - Non-core operations in HPMC and AA&S Segment $ in Millions	Jun. 30, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	$ 9.6
Accounts receivable, net	8.6
Inventories, net	24.3
Prepaid expenses and other current assets	1.7
Total current assets	44.2
Property, plant and equipment, net	3.7
Other assets	2.3
Total long-term assets	6.0
Total Assets	50.2
Accounts payable	1.1
Other current liabilities	2.7
Total current liabilities	3.8
Other long-term liabilities	1.6
Total Liabilities	5.4
Net assets held for sale	$ 44.8