Landfill and Environmental Remediation Liabilities - Changes (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2022	Jun. 30, 2023
Landfill and environmental remediation liabilities
Revisions in estimates and interest rate assumptions	$ 17
Ending balance, environmental remediation		$ 196
San Jacinto Waste Pits [Member]
Landfill and environmental remediation liabilities
Beginning balance, environmental remediation		68
Revisions in estimates and interest rate assumptions	$ 17
Ending balance, environmental remediation		69
Landfill [Member]
Landfill and environmental remediation liabilities
Beginning balance, landfill		2,664
Obligations incurred and capitalized		40
Obligations settled		(63)
Interest accretion		62
Revisions in estimates and interest rate assumptions		4
Acquisitions, divestitures and other adjustments		2
Ending balance, landfill		2,709
Environmental Remediation Liabilities [Member]
Landfill and environmental remediation liabilities
Beginning balance, environmental remediation		204
Obligations settled		(12)
Interest accretion		3
Revisions in estimates and interest rate assumptions		2
Acquisitions, divestitures and other adjustments		(1)
Ending balance, environmental remediation		$ 196

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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