Landfill and Environmental Remediation Liabilities - Changes (Detail) $ in Millions	9 Months Ended
Sep. 30, 2024 USD ($)
Landfill and Environmental Remediation Liabilities
Ending balance, environmental remediation	$ 202
Landfill [Member]
Landfill and Environmental Remediation Liabilities
Beginning balance, landfill	2,853
Obligations incurred and capitalized	69
Obligations settled	(98)
Interest accretion	99
Revisions in estimates	9
Acquisitions, divestitures and other adjustments	(1)
Ending balance, landfill	2,931
Environmental Remediation Liabilities [Member]
Landfill and Environmental Remediation Liabilities
Beginning balance, environmental remediation	209
Obligations settled	(19)
Revisions in estimates and interest rate assumptions	12
Ending balance, environmental remediation	$ 202

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

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