Landfill and Environmental Remediation Liabilities - Changes (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Landfill and environmental remediation liabilities
Revisions in estimates and interest rate assumptions			$ 33
Ending balance, environmental remediation		$ 204
San Jacinto Waste Pits [Member]
Landfill and environmental remediation liabilities
Beginning balance, environmental remediation	$ 53	53
Revisions in estimates and interest rate assumptions	17	17
Ending balance, environmental remediation		68	53
Landfill [Member]
Landfill and environmental remediation liabilities
Beginning balance, landfill	2,326	2,326
Obligations incurred and capitalized		114
Obligations settled		(121)
Interest accretion		108
Revisions in estimates and interest rate assumptions		243
Acquisitions, divestitures and other adjustments		(6)
Ending balance, landfill		2,664	2,326
Environmental Remediation Liabilities [Member]
Landfill and environmental remediation liabilities
Beginning balance, environmental remediation	$ 213	213
Obligations settled		(28)
Interest accretion		4
Revisions in estimates and interest rate assumptions		15
Ending balance, environmental remediation		$ 204	$ 213

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

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