ASSET RETIREMENT OBLIGATIONS (Tables)

3 Months Ended

Mar. 31, 2025

Asset Retirement Obligation [Abstract]

Summary of Asset Retirement Obligations

The following is a summary of our asset retirement obligations:

(In millions)	March 31, 2025		December 31, 2024
Asset retirement obligations1	$	525	$	526
Less: current portion	19		25
Long-term asset retirement obligations	$	506	$	501
1 Includes $305 million and $302 million related to our active operations as of March 31, 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	7		5
Revision in estimated cash flows	—		48
Remediation payments	(8)		(2)
Asset retirement obligations as of March 31	$	525	$	510

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 of required remediation.

Schedule of Environmental Obligations

The following is a summary of our environmental obligations:

(In millions)	March 31, 2025		December 31, 2024
Environmental obligations	$	113	$	114
Less: current portion	11		14
Long-term environmental obligations	$	102	$	100