Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 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):

	Third quarter ended September 30,				Nine months ended September 30,
	2024		2023		2024		2023
Weighted average common shares outstanding – basic		232		178		197		178
Effect of dilutive securities:
Stock options		—		—		—		—
Stock units		2		—		—		—
Weighted average common shares outstanding – diluted		234		178		197		178