Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
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	$ 219
Current (in accrued liabilities)	227	$ 231
Long-term	3,081	3,048
Total	3,308	3,279
Landfill [Member]
Landfill and Environmental Remediation Liabilities
Current (in accrued liabilities), Landfill	176	177
Long-term, Landfill	2,913	2,880
Total, Landfill	3,089	3,057
Environmental Remediation Liabilities [Member]
Landfill and Environmental Remediation Liabilities
Current (in accrued liabilities), Environmental Remediation	51	54
Long-term, Environmental Remediation	168	168
Total, Environmental Remediation	$ 219	$ 222