Asset retirement obligations consist primarily of rehabilitation and restoration costs, landfill capping costs, decommissioning costs, and closure and post-closure costs. Activities related to asset retirement obligations were as follows:


	Three Months Ended March 31,
	2025		2024
Beginning balance	$	186	$	186
Additions	1		5
Accretion expense	5		5
Remeasurement/translation	3		(7)
Other, including change in estimates1	12		—
Settlements/payments	(2)		(1)



Balance, March 31,	$	205	$	188

1 - Other, including change in estimates includes a charge of $11 million related to the Botlek plant shutdown recorded in "Restructuring and other charges" on the condensed consolidated statement of operations for three months ended March 31, 2025. Refer to note 2 for further details.


	March 31, 2025		December 31, 2024
Current portion included in “Accrued liabilities”	$	14	$	14
Noncurrent portion included in “Asset retirement obligations”	191		172
Asset retirement obligations	$	205	$	186