Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

Changes to Asset Retirement Obligations

The following table describes the changes in our asset retirement obligations for the years ended December 31:

	2022		2021
	(In millions)
Balance at January 1	$	1,190	$	999
Liabilities incurred	126		229
Liabilities settled or disposed of	(213)		(207)
Accretion expense	48		44
Revisions of estimated liabilities	92		126
Foreign currency remeasurement	(2)		(1)
Balance at December 31	$	1,241	$	1,190
Total Asset Retirement Obligations at December 31:
Current portion of asset retirement obligations	$	207	$	185
Long-term asset retirement obligations	1,034		1,005
Total at December 31	$	1,241	$	1,190