v3.26.3
ASSET RETIREMENT OBLIGATIONS (Tables)
 9 Months Ended
Sep. 30, 2026
Asset Retirement Obligation [Abstract]  
Summary of Asset Retirement Obligations
The following is a summary of our asset retirement obligations:
(In millions)September 30,
2026		December 31,
2025
Asset retirement obligations1
$616 $599 
Less: current portion18 18 
Long-term asset retirement obligations$598 $581 
1 Includes $387 million and $375 million related to our active operations as of September 30, 2026 and December 31, 2025, respectively.
Schedule of Change in Asset Retirement Obligation
The following is a roll-forward of our asset retirement obligations:
(In millions)20262025
Asset retirement obligations as of January 1$599 $526 
Accretion expense25 21 
Revision in estimated cash flows— 4 
Remediation payments(8)(16)
Asset retirement obligations as of September 30$616 $535 
Schedule of Environmental Obligations
The following is a summary of our environmental obligations:
(In millions)September 30,
2026		December 31,
2025
Environmental obligations$114 $112 
Less: current portion14 11 
Long-term environmental obligations$100 $101