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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 —Ìý
Decrease from sale of business —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