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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] Ìý
Schedule of Asset Retirement Obligations
The following is a summary of our asset retirement obligations:
December 31,
(In millions) 2024 2023
Asset retirement obligations1
$ 526Ìý $ 459Ìý
Less: current portion 25Ìý 15Ìý
Long-term asset retirement obligations $ 501Ìý $ 444Ìý
1 Includes $302 million and $259 million related to our active operations as of DecemberÌý31, 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 $ 459Ìý $ 520Ìý
Increase from Stelco Acquisition 20Ìý —Ì�
Decrease from sale of business â€�Ìý (76)
Accretion expense 22Ìý 26Ìý
Remediation payments (33) (21)
Revision in estimated cash flows 58Ìý 10Ìý
Asset retirement obligation as of December 31 $ 526Ìý $ 459Ìý
Schedule of Environmental Obligations
The following is a summary of our environmental obligations:
December 31,
(In millions) 2024 2023
Environmental obligations $ 114Ìý $ 134Ìý
Less: current portion 14Ìý 21Ìý
Long-term environmental obligations $ 100Ìý $ 113Ìý