Business Combinations and Discontinued Operations - Summary of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Discontinued Operations And Disposal Groups [Abstract]
Inventories, net	$ 53.1	$ 2.3
Property, plant and equipment		4.8
Intangible assets, excluding goodwill		0.2
Goodwill		0.5
Other assets	49.1	2.0
Total current assets held for sale	102.2	9.8
Property, plant and equipment	226.0
Intangible assets, excluding goodwill	264.9
Operating lease right-of-use assets	18.1
Goodwill	109.3
Other assets	4.6
Valuation allowance for loss on sale	(6.0)
Total noncurrent assets held for sale	616.9
Asset retirement obligations		(0.3)
Lease obligations	(7.5)
Total current liabilities held for sale	(7.5)	$ (0.3)
Asset retirement obligations	(31.5)
Lease obligations	(22.0)
Total noncurrent liabilities held for sale	$ (53.5)