Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

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

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

	First quarter ended March 31,
	2023			2022
Net (loss) income attributable to Alcoa Corporation	$	(231	)	$	469
Average shares outstanding – basic		178			184
Effect of dilutive securities:
Stock options		—			—
Stock units		—			4
Average shares outstanding – diluted		178			188