v3.26.1
Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Landfill and Environmental Remediation Liabilities    
Total, Environmental Remediation $ 230  
Current (in accrued liabilities) 244 $ 258
Long-term 3,325 3,278
Total 3,569 3,536
Landfill [Member]    
Landfill and Environmental Remediation Liabilities    
Current (in accrued liabilities), Landfill 186 186
Long-term, Landfill 3,153 3,119
Total, Landfill 3,339 3,305
Environmental Remediation Liabilities [Member]    
Landfill and Environmental Remediation Liabilities    
Current (in accrued liabilities), Environmental Remediation $ 58 $ 72
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration] Accrued Liabilities, Current Accrued Liabilities, Current
Long-term, Environmental Remediation $ 172 $ 159
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] Long-term Long-term
Total, Environmental Remediation $ 230 $ 231