Inventories, Net - Schedule of Inventories Net (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Finished products	$ 810.8	$ 713.3
Products in process	14.1	30.1
Raw materials	83.9	69.6
Supplies and expendable parts	133.5	153.9
Inventories, Gross	1,042.3	966.9
Less: Allowances	(259.9)	(214.3)
Total	$ 782.4	$ 752.6

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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