Goodwill and Other Intangible Assets - Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 889	$ 832
Accumulated Amortization	(197)	(168)
Net Balance	692	664
Noncompetition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4	4
Accumulated Amortization	(4)	(4)
Net Balance	0	0
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	462	421
Accumulated Amortization	(101)	(80)
Net Balance	361	341
Operating Permits
Finite-Lived Intangible Assets [Line Items]
Gross Amount	370	369
Accumulated Amortization	(62)	(56)
Net Balance	308	313
Use Rights And Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	30	14
Accumulated Amortization	(13)	(12)
Net Balance	17	2
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	23	24
Accumulated Amortization	(17)	(16)
Net Balance	$ 6	$ 8