Inventories (Details) - USD ($) $ in Millions	Sep. 28, 2025	Dec. 29, 2024
Inventory [Line Items]
Raw materials and supplies	$ 242.1	$ 206.4
Work-in-process	1,151.5	1,144.1
Finished goods	89.5	71.0
Inventory, Gross, Total	1,483.1	1,421.5
Inventory valuation reserves	(77.5)	(68.5)
Total inventories, net	$ 1,405.6	$ 1,353.0

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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