Business Combinations, Divestitures and Discontinued Operations - Summary of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	$ 19.5	$ 53.1
Investment land	38.0	32.7
Other assets		16.4
Total current assets held for sale	57.5	102.2
Property, plant and equipment	130.0	226.0
Intangible assets, excluding goodwill	208.5	264.9
Operating lease right-of-use assets	14.0	18.1
Goodwill	35.7	109.3
Other assets	5.4	4.6
Valuation allowance for loss on sale	(5.4)	(6.0)
Total noncurrent assets held for sale	388.2	616.9
Lease obligations	(5.2)	(7.5)
Total current liabilities held for sale	(5.2)	(7.5)
Asset retirement obligations	(19.8)	(31.5)
Lease obligations	(8.5)	(22.0)
Other liabilities	(0.8)
Total noncurrent liabilities held for sale	(29.1)	(53.5)
Continuing Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Investment land	38.0	32.7
Total current assets held for sale	38.0	32.7
Discontinued Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	19.5	53.1
Other assets		16.4
Total current assets held for sale	19.5	69.5
Property, plant and equipment	130.0	226.0
Intangible assets, excluding goodwill	208.5	264.9
Operating lease right-of-use assets	14.0	18.1
Goodwill	35.7	109.3
Other assets	5.4	4.6
Valuation allowance for loss on sale	(5.4)	(6.0)
Total noncurrent assets held for sale	388.2	616.9
Lease obligations	(5.2)	(7.5)
Total current liabilities held for sale	(5.2)	(7.5)
Asset retirement obligations	(19.8)	(31.5)
Lease obligations	(8.5)	(22.0)
Other liabilities	(0.8)
Total noncurrent liabilities held for sale	$ (29.1)	$ (53.5)