Inventories Schedule of Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jan. 01, 2023
Inventory, Gross [Abstract]
Raw materials and supplies	$ 234.9	$ 213.6
Work-in-process	973.6	941.1
Finished goods	114.5	111.9
Total inventories at current cost	1,323.0	1,266.6
Inventory valuation reserves	(75.5)	(70.9)
Total inventories, net	$ 1,247.5	$ 1,195.7

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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No definition available.

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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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