Restructuring and Other Charges, Net (Tables)

12 Months Ended

Dec. 31, 2020

Restructuring And Related Activities [Abstract]

Schedule of Restructuring and Other Charges, Net

Restructuring and other charges, net for each year in the three-year period ended December 31, 2020 were comprised of the following:

	2020			2019			2018
Settlements and/or curtailments related to retirement benefits (O)	$	58		$	119		$	331
Severance and employee termination costs		16			51			2
Asset impairments		2			225			18
Asset retirement obligations (R)		2			75			5
Environmental remediation (S)		1			69			2
Loss on divestitures		—			446			—
Allowance on value-added tax credits (U)		—			—			107
Power contract payments – non-recurring		—			—			62
Other		36			52			48
Reversals of previously recorded layoff and other costs		(11	)		(6	)		(48	)
Restructuring and other charges, net	$	104		$	1,031		$	527

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:

	2020		2019		2018
Bauxite	$	1	$	5	$	1
Alumina		5		272		112
Aluminum		53		611		102
Segment total		59		888		215
Corporate		45		143		312
Total Restructuring and other charges, net	$	104	$	1,031	$	527

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, 2017	$	11		$	34		$	45
Restructuring charges, net		2			109			111
Cash payments		(7	)		(95	)		(102	)
Reversals and other		(1	)		(6	)		(7	)
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