Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
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	$ 202
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Long-term, Accrued Liabilities, Current	Long-term, Accrued Liabilities, Current
Current (in accrued liabilities)	$ 153	$ 166
Long-term	2,436	2,373
Total	2,589	2,539
Landfill [Member]
Landfill and environmental remediation liabilities
Current (in accrued liabilities), Landfill	124	137
Long-term, Landfill	2,263	2,189
Total, Landfill	2,387	2,326
Environmental Remediation Liabilities [Member]
Landfill and environmental remediation liabilities
Current (in accrued liabilities), Environmental Remediation	29	29
Long-term, Environmental Remediation	173	184
Total, Environmental Remediation	$ 202	$ 213