Quarterly report [Sections 13 or 15(d)]

ASSET RETIREMENT OBLIGATIONS (Tables)

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 portion 18  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) 2026 2025
Asset retirement obligations as of January 1 $ 599  $ 526 
Accretion expense 25  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 portion 14  11 
Long-term environmental obligations $ 100  $ 101