ASSET RETIREMENT OBLIGATIONS (Tables)

3 Months Ended

Mar. 31, 2026

Asset Retirement Obligation [Abstract]

Summary of Asset Retirement Obligations

The following is a summary of our asset retirement obligations:

(In millions)	March 31, 2026		December 31, 2025
Asset retirement obligations1	$	605	$	599
Less: current portion	16		18
Long-term asset retirement obligations	$	589	$	581
1 Includes $380 million and $375 million related to our active operations as of March 31, 2026 and December 31, 2025, respectively.

Schedule of Change in Asset Retirement Obligation

The following is a roll-forward of our asset retirement obligations:

(In millions)	2026		2025
Asset retirement obligations as of January 1	$	599	$	526
Accretion expense	9		7
Remediation payments	(3)		(8)
Asset retirement obligations as of March 31	$	605	$	525

Schedule of Environmental Obligations

The following is a summary of our environmental obligations:

(In millions)	March 31, 2026		December 31, 2025
Environmental obligations	$	117	$	112
Less: current portion	13		11
Long-term environmental obligations	$	104	$	101