Inventories, Net - Inventories, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Inventory [Line Items]
Raw materials	$ 116.1	$ 81.3
Work in process	49.6	47.2
Finished products	226.1	250.2
Supplies (chemicals)	77.3	80.0
Total	469.1	458.7
Chemicals
Inventory [Line Items]
Raw materials	108.9	76.3
Work in process	28.6	30.4
Finished products	221.0	246.4
Component Products
Inventory [Line Items]
Raw materials	7.2	5.0
Work in process	21.0	16.8
Finished products	$ 5.1	$ 3.8

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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