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Annual report [Section 13 and 15(d), not S-K Item 405]

ASSET RETIREMENT OBLIGATIONS (Tables)

v3.25.0.1
ASSET RETIREMENT OBLIGATIONS (Tables)
12 Months Ended
Dec. 31, 2024
Environmental Remediation Obligations [Abstract]
Schedule of Asset Retirement Obligations
The following is a summary of our asset retirement obligations:
December 31,
(In millions) 2024 2023
Asset retirement obligations1
$ 526 $ 459听
Less: current portion 25 15听
Long-term asset retirement obligations $ 501 $ 444听
1 Includes $302 million and $259 million related to our active operations as of December听31, 2024 and 2023, respectively.
Roll-forward of Asset Retirement Obligation Liability
The following is a roll-forward of our asset retirement obligation:
(In millions) 2024 2023
Asset retirement obligation as of January 1 $ 459 $ 520听
Increase from Stelco Acquisition 20 鈥斕�
Decrease from sale of business 鈥� (76)
Accretion expense 22 26听
Remediation payments (33) (21)
Revision in estimated cash flows 58 10听
Asset retirement obligation as of December 31 $ 526 $ 459听
Schedule of Environmental Obligations
The following is a summary of our environmental obligations:
December 31,
(In millions) 2024 2023
Environmental obligations $ 114 $ 134听
Less: current portion 14 21听
Long-term environmental obligations $ 100 $ 113听