Inventories, Net - Inventories, Net (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Inventory [Line Items]
Raw materials	$ 79.1	$ 78.7
Work in process	31.7	30.4
Finished products	222.8	236.1
Supplies	61.3	60.0
Total	394.9	405.2
Chemicals
Inventory [Line Items]
Raw materials	76.3	75.9
Work in process	22.6	21.1
Finished products	220.2	233.1
Component Products
Inventory [Line Items]
Raw materials	2.8	2.8
Work in process	9.1	9.3
Finished products	$ 2.6	$ 3.0

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 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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

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