Contingencies and Commitments (Tables)

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Schedule of Changes in Carrying Value of Recorded Environmental Remediation Reserves

Alcoa Corporation’s environmental remediation reserve balance reflects the most probable costs to remediate identified environmental conditions for which costs can be reasonably estimated. The following table details the changes in the carrying value of recorded environmental remediation reserves:

Balance at December 31, 2018	$	280
Liabilities incurred		73
Cash payments		(17	)
Reversals of previously recorded liabilities		(1	)
Balance at December 31, 2019		335
Liabilities incurred		7
Cash payments		(19	)
Foreign currency translation and other		(1	)
Balance at December 31, 2020		322
Liabilities incurred		21
Cash payments		(23	)
Reversals of previously recorded liabilities		(17	)
Foreign currency translation and other		6
Balance at December 31, 2021	$	309

Schedule of Estimate Timing of Cash Outflows from Environmental Reserves

The estimated timing of cash outflows from the environmental remediation reserve at December 31, 2021 is as follows:        

2022	$	44
2023 - 2027		155
Thereafter		110
Total	$	309