Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Inventories, net:
Manufacturing supplies	$ 34.7	$ 34.2
Raw materials	98.3	100.0
Work in process	304.2	308.9
Inventory, Finished Goods, Gross	401.6	439.0
Subtotal	838.8	882.1
Allowance for obsolete and surplus inventory	(48.9)	(40.1)
Total Inventories, net	$ 789.9	$ 842.0

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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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 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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