Inventories, net (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Inventories, net [Line Items]
Raw materials	$ 153.3	$ 194.0
Work in process	43.3	49.9
Finished products	214.4	256.3
Supplies (chemicals)	93.1	95.9
Total	504.1	596.1
Chemicals
Inventories, net [Line Items]
Raw materials	148.3	188.3
Work in process	25.6	30.8
Finished products	209.6	250.4
Component products
Inventories, net [Line Items]
Raw materials	5.0	5.7
Work in process	17.7	19.1
Finished products	$ 4.8	$ 5.9

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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