Inventories - Schedule of Components of Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Inventories, net:
Manufacturing supplies	$ 44.2	$ 42.8
Raw materials	132.3	155.2
Work in process	489.3	476.0
Finished products	608.6	595.0
Subtotal	1,274.4	1,269.0
Allowance for obsolete and surplus inventory	(78.0)	(73.4)
Total inventories, net	$ 1,196.4	$ 1,195.6

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

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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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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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