Goodwill and Other Intangible Assets - Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 1,166.4	$ 585.4
Accumulated Amortization	(137.4)	(113.4)
Net Balance	1,029.0	472.0
Noncompetition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4.2	4.2
Accumulated Amortization	(4.1)	(4.1)
Net Balance	0.1	0.1
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	425.3	91.3
Accumulated Amortization	(49.2)	(35.6)
Net Balance	376.1	55.7
Operating Permits
Finite-Lived Intangible Assets [Line Items]
Gross Amount	697.3	460.8
Accumulated Amortization	(56.6)	(48.4)
Net Balance	640.7	412.4
Use Rights And Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	16.3	16.3
Accumulated Amortization	(13.9)	(13.0)
Net Balance	2.4	3.3
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	23.3	12.8
Accumulated Amortization	(13.6)	(12.3)
Net Balance	$ 9.7	$ 0.5