INVENTORIES (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Inventory Disclosure [Abstract]
Supplies	$ 81.0	$ 80.5	$ 74.6
Raw materials	74.3	74.9	73.1
Work in process	114.9	140.3	140.6
Finished goods	392.7	449.5	469.8
Inventories excluding LIFO reserve	662.9	745.2	758.1
LIFO reserve	(43.8)	(49.5)	(59.2)
Inventories, net	$ 619.1	$ 695.7	$ 698.9

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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 by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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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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