Restructuring and Other Charges, Net (Tables)

12 Months Ended

Dec. 31, 2021

Restructuring And Related Activities [Abstract]

Schedule of Restructuring and Other Charges, Net

Restructuring and other charges, net were comprised of the following:

	2021			2020			2019
Settlements and/or curtailments related to retirement benefits (O)	$	977		$	58		$	119
Severance and employee termination costs		1			16			51
Asset impairments		75			2			225
Asset retirement obligations (R)		23			2			75
Environmental remediation (S)		15			1			69
Loss on divestitures		—			—			446
Other		82			36			52
Reversals of previously recorded layoff and other costs		(45	)		(11	)		(6	)
Restructuring and other charges, net	$	1,128		$	104		$	1,031

Schedule of Restructuring and Other Charges, Net by Reportable Segments, Pretax

Alcoa Corporation does not include Restructuring and other charges, net in the results of its reportable segments. The impact of allocating such charges to segment results would have been as follows:

	2021		2020		2019
Bauxite	$	—	$	1	$	5
Alumina		1		5		272
Aluminum		184		53		611
Segment total		185		59		888
Corporate		943		45		143
Total Restructuring and other charges, net	$	1,128	$	104	$	1,031

Activity and Reserve Balances for Restructuring Charges

Activity and reserve balances for restructuring charges were as follows:

	Severance and employee termination costs			Other costs			Total
Balances at December 31, 2018	$	5		$	42		$	47
Restructuring charges, net		51			161			212
Cash payments		(19	)		(99	)		(118	)
Reversals and other		(2	)		(2	)		(4	)
Balances at December 31, 2019		35			102			137
Restructuring charges, net		16			36			52
Cash payments		(41	)		(79	)		(120	)
Reversals and other		(4	)		(2	)		(6	)
Balances at December 31, 2020		6			57			63
Restructuring charges, net		1			80			81
Cash payments		(4	)		(25	)		(29	)
Reversals and other		—			(22	)		(22	)
Balances at December 31, 2021	$	3		$	90		$	93