Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2023

Asset Retirement Obligation [Abstract]

Schedule of asset retirement obligations

Asset retirement obligations activity is as follows:

	Year Ended December 31,
	2023		2022
	(in millions)
Beginning asset retirement obligations	$	477	$	354
Additions	7		8
Changes in estimates (a)	26		162
Liabilities settled	(67)		(62)
Accretion of discount	16		15
Ending asset retirement obligations	459		477
Less current portion of asset retirement obligations	90		82
Asset retirement obligations, long-term	$	369	$	395

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(a)Changes in estimates are determined based on several factors, including updating abandonment cost estimates using recent actual costs for abandonment activity, credit-adjusted risk-free discount rates, economic well life estimates and forecasted timing of abandoning wells.