Inventories, Net - Inventories, Net (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Raw materials	$ 164.9	$ 151.5
Work in process	56.1	52.0
Finished products	339.4	355.8
Supplies (chemicals)	83.4	81.5
Total	643.8	640.8
Chemicals
Inventory [Line Items]
Raw materials	158.9	145.3
Work in process	36.7	32.0
Finished products	334.5	350.7
Component Products
Inventory [Line Items]
Raw materials	6.0	6.2
Work in process	19.4	20.0
Finished products	$ 4.9	$ 5.1

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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