Inventories, Net - Schedule of Inventories Net (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Finished products	$ 713.3	$ 667.0
Products in process	30.1	37.1
Raw materials	69.6	35.3
Supplies and expendable parts	153.9	149.9
Total inventories	966.9	889.3
Less: allowances	(214.3)	(180.3)
Inventories, net	$ 752.6	$ 709.0

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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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