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