Quarterly report [Sections 13 or 15(d)]

ASSET RETIREMENT OBLIGATIONS (Tables)

v3.26.1
ASSET RETIREMENT OBLIGATIONS (Tables)
6 Months Ended
Jun. 30, 2026
Asset Retirement Obligation [Abstract]  
Summary of Asset Retirement Obligations
The following is a summary of our asset retirement obligations:
(In millions) June 30,
2026
December 31,
2025
Asset retirement obligations1
$ 611  $ 599 
Less: current portion 17  18 
Long-term asset retirement obligations $ 594  $ 581 
1 Includes $383 million and $375 million related to our active operations as of June 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 17  15 
Revision in estimated cash flows  
Remediation payments (5) (12)
Asset retirement obligations as of June 30 $ 611  $ 534 
Schedule of Environmental Obligations
The following is a summary of our environmental obligations:
(In millions) June 30,
2026
December 31,
2025
Environmental obligations $ 115  $ 112 
Less: current portion 14  11 
Long-term environmental obligations $ 101  $ 101