Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted EPS Attributable to Alcoa Corporation Common Shareholders

The information used to compute basic and diluted EPS attributable to Alcoa Corporation common shareholders was as follows (shares in millions):

	Third quarter ended September 30,					Nine months ended September 30,
	2022			2021		2022		2021
Net (loss) income attributable to Alcoa Corporation	$	(746	)	$	337	$	272	$	821
Average shares outstanding – basic		179			187		182		187
Effect of dilutive securities:
Stock units		—			4		4		3
Average shares outstanding – diluted		179			191		186		190