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ASSET RETIREMENT OBLIGATIONS (Tables) | 6 Months Ended
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Jun. 30, 2025
Asset Retirement Obligation [Abstract] |
Summary of Asset Retirement Obligations | The following is a summary of our asset retirement obligations:
(In millions) | June 30, 2025 |  | December 31, 2024
Asset retirement obligations 1 | $ | 534 |  |  | $ | 526 |
Less: current portion | 21 |  |  | 25 |
Long-term asset retirement obligations | $ | 513 |  |  | $ | 501 |
1 Includes $308 million and $302 million related to our active operations as of June 30, 2025 and December 31, 2024, respectively.
Schedule of Change in Asset Retirement Obligation | The following is a roll-forward of our asset retirement obligations:
(In millions) | 2025 |  | 2024
Asset retirement obligations as of January 1 | $ | 526 |  |  | $ | 459 |
Accretion expense | 15 |  |  | 11 |
Revision in estimated cash flows | 5 |  |  | 50 |
Remediation payments | (12) |  |  | (14) |
Asset retirement obligations as of June 30 | $ | 534 |  |  | $ | 506 |
During the first quarter of 2024, we announced the indefinite idle of our Weirton tinplate production plant, resulting in an increase to our asset retirement obligations as a result of acceleration of the timing and refinement in the cost required.
Schedule of Environmental Obligations | The following is a summary of our environmental obligations:
(In millions) | June 30, 2025 |  | December 31, 2024
Environmental obligations | $ | 112 |  |  | $ | 114 |
Less: current portion | 12 |  |  | 14 |
Long-term environmental obligations | $ | 100 |  |  | $ | 100 |

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