Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Inventories, net:
Manufacturing supplies	$ 35.2	$ 34.8
Raw materials	107.3	99.5
Work in process	332.9	320.3
Inventory, Finished Goods, Gross	444.4	441.2
Subtotal	919.8	895.8
Allowance for obsolete and surplus inventory	(55.0)	(54.5)
Total Inventories, net	$ 864.8	$ 841.3

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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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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