Landfill and Environmental Remediation Liabilities - Changes (Detail) $ in Millions	6 Months Ended
Jun. 30, 2024 USD ($)
Landfill and Environmental Remediation Liabilities
Ending balance, environmental remediation	$ 208
Landfill [Member]
Landfill and Environmental Remediation Liabilities
Beginning balance, landfill	2,853
Obligations incurred and capitalized	43
Obligations settled	(58)
Interest accretion	66
Revisions in estimates	1
Acquisitions, divestitures and other adjustments	(2)
Ending balance, landfill	2,903
Environmental Remediation Liabilities [Member]
Landfill and Environmental Remediation Liabilities
Beginning balance, environmental remediation	209
Obligations settled	(11)
Revisions in estimates and interest rate assumptions	10
Ending balance, environmental remediation	$ 208

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

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