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Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Landfill and environmental remediation liabilities |  |
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current | Accrued Liabilities, Current
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Long-term | Long-term
Total, Environmental Remediation | $ 185 |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Long-term, Accrued Liabilities, Current | Long-term, Accrued Liabilities, Current
Current (in accrued liabilities) | $ 174 | $ 168
Long-term | 2,727 | 2,700
Total | 2,901 | 2,868
Landfill [Member] |  |
Landfill and environmental remediation liabilities |  |
Current (in accrued liabilities), Landfill | 142 | 137
Long-term, Landfill | 2,574 | 2,527
Total, Landfill | 2,716 | 2,664
Environmental Remediation Liabilities [Member] |  |
Landfill and environmental remediation liabilities |  |
Current (in accrued liabilities), Environmental Remediation | 32 | 31
Long-term, Environmental Remediation | 153 | 173
Total, Environmental Remediation | $ 185 | $ 204

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