Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

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,
	2024			2023
Net loss attributable to Alcoa Corporation	$	(252	)	$	(231	)
Average shares outstanding – basic		179			178
Effect of dilutive securities:
Stock options		—			—
Stock units		—			—
Average shares outstanding – diluted		179			178