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Discontinued Operations - Assets and Liabilities (Details) - USD ($)
$ in Millions
Sep. 25, 2022
Dec. 31, 2021
Held-for-sale assets    
Held-for-sale assets $ 9.1 $ 8.5
Held-for-sale liabilities    
Held-for-sale liabilities 4.9 1.4
Discontinued operations | Superform Aluminum Superplastic    
Held-for-sale assets    
Right-of-use-assets from operating leases 2.8 0.0
Inventory 3.0 2.7
Accounts and other receivables 2.1 2.1
Held-for-sale assets 7.9 4.8
Held-for-sale liabilities    
Accounts payable 1.1 0.5
Accrued liabilities 0.5 0.1
Other liabilities 0.2 0.0
Lease Liabilities 3.1 0.8
Held-for-sale liabilities $ 4.9 $ 1.4