Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2024

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Carrying Value of Recorded AROs by Major Category

The following table details the carrying value of recorded AROs by major category, of which $204 and $217 was classified as a current liability as of December 31, 2024 and 2023, respectively:

December 31,	2024		2023
Closure of bauxite residue areas	$	396	$	437
Mine reclamation		321		328
Spent pot lining disposal		103		124
Demolition		50		76
Landfill closure		25		24
Balance at end of year	$	895	$	989

Schedule of Changes in Carrying Value of Recorded AROs

The following table details the changes in the total carrying value of recorded AROs:

December 31,	2024			2023
Balance at beginning of year	$	989		$	828
Accretion expense		38			33
Liabilities incurred		160			254
Payments		(196	)		(148	)
Reversals of previously recorded liabilities		(10	)		(8	)
Foreign currency translation and other		(86	)		30
Balance at end of year	$	895		$	989

Schedule of Estimated Timing of Cash Outflows on Asset Retirement Obligations

The estimated timing of cash outflows for recorded AROs at December 31, 2024 was as follows:

2025	$	204
2026 – 2029		522
Thereafter		169
Total	$	895