Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Landfill and environmental remediation liabilities
Total, Environmental Remediation	$ 211
Current (in accrued liabilities)	164	$ 166
Long-term	2,426	2,373
Total	2,590	2,539
Landfill [Member]
Landfill and environmental remediation liabilities
Current (in accrued liabilities), Landfill	135	137
Long-term, Landfill	2,244	2,189
Total, Landfill	2,379	2,326
Environmental Remediation Liabilities [Member]
Landfill and environmental remediation liabilities
Current (in accrued liabilities), Environmental Remediation	29	29
Long-term, Environmental Remediation	182	184
Total, Environmental Remediation	$ 211	$ 213

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

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