ASSET RETIREMENT OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2022

Asset Retirement Obligation [Abstract]

Summary Of Asset Retirement Obligations

The following is a summary of our asset retirement obligations:

	(In Millions)
	June 30, 2022		December 31, 2021
Asset retirement obligations1	$	532	$	449
Less: current portion	30		35
Long-term asset retirement obligations	$	502	$	414
1 Includes $290 million and $293 million related to our active operations as of June 30, 2022 and December 31, 2021, respectively.

Schedule of Change in Asset Retirement Obligation

The following is a roll forward of our asset retirement obligation liability:

	(In Millions)
	2022		2021
Asset retirement obligation as of January 1	$	449	$	342
Increase from acquisitions	—		57
Accretion expense	15		8
Reclassification from environmental obligations	63		—
Revision in estimated cash flows	21		—
Remediation payments	(16)		(10)
Asset retirement obligation as of June 30	$	532	$	397