Discontinued Operations and Assets and Liabilities Held for Sale - Summary of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	$ 38.6	$ 31.3
Investment land	20.6	40.6
Other assets	0.9	1.3
Total current assets held for sale	60.1	73.2
Property, plant and equipment	126.8	124.5
Intangible assets, excluding goodwill	208.5	208.5
Operating lease right-of-use assets	11.9	12.1
Goodwill	31.9	31.9
Valuation allowance for loss on sale	(4.5)	(4.5)
Total noncurrent assets held for sale	374.6	372.5
Lease obligations	(4.2)	(4.5)
Total current liabilities held for sale	(4.2)	(4.5)
Lease obligations	(3.3)	(4.1)
Asset retirement obligations	(17.9)	(17.7)
Total noncurrent liabilities held for sale	(21.2)	(21.8)
Continuing Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Investment land	20.6	40.6
Total current assets held for sale	20.6	40.6
Discontinued Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	38.6	31.3
Other assets	0.9	1.3
Total current assets held for sale	39.5	32.6
Property, plant and equipment	126.8	124.5
Intangible assets, excluding goodwill	208.5	208.5
Operating lease right-of-use assets	11.9	12.1
Goodwill	31.9	31.9
Valuation allowance for loss on sale	(4.5)	(4.5)
Total noncurrent assets held for sale	374.6	372.5
Lease obligations	(4.2)	(4.5)
Total current liabilities held for sale	(4.2)	(4.5)
Lease obligations	(3.3)	(4.1)
Asset retirement obligations	(17.9)	(17.7)
Total noncurrent liabilities held for sale	$ (21.2)	$ (21.8)