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Inventories (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Inventory [Line Items] |  |
Raw materials and supplies | $ 229.3 | $ 234.9
Work-in-process | 1,030.0 | 973.6
Finished goods | 94.7 | 114.5
Inventory, Gross, Total | 1,354.0 | 1,323.0
Inventory valuation reserves | (69.1) | (75.5)
Total inventories, net | $ 1,284.9 | $ 1,247.5

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