Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2023

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 $217 and $117 was classified as a current liability as of December 31, 2023 and 2022, respectively:

December 31,	2023		2022
Closure of bauxite residue areas	$	437	$	342
Mine reclamation		328		279
Spent pot lining disposal		124		115
Demolition		76		61
Landfill closure		24		31
Balance at end of year	$	989	$	828

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,	2023			2022
Balance at beginning of year	$	828		$	738
Accretion expense		33			20
Liabilities incurred		254			224
Payments		(148	)		(114	)
Reversals of previously recorded liabilities		(8	)		(12	)
Foreign currency translation and other		30			(28	)
Balance at end of year	$	989		$	828

Schedule of Estimated Timing of Cash Outflows on Asset Retirement Obligations

The estimated timing of cash outflows for recorded AROs at December 31, 2023 was as follows:

2024	$	217
2025 – 2028		573
Thereafter		199
Total	$	989