Summary of Significant Accounting Policies (Major Classes of Inventories) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Major Classes of Inventories
Raw materials and supplies	$ 85.0	$ 67.6
Work in process	48.9	43.9
Raw materials and supplies	182.0	171.3
LIFO reserve	1.9	0.0
Inventories, net	317.8	282.8
Inventory reserves	(34.9)	(29.8)
Consigned inventory	$ 10.3	$ 9.8

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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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Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. This amount is net of valuation reserves and adjustments.

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Amount of valuation reserve for inventory.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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Gross amount of inventory owned by the entity but in the hands of a customer, typically a reseller.

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