Earnings Per Share (Tables)

12 Months Ended

Dec. 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):

	2023		2022		2021
Average shares outstanding—basic		178		181		186
Effect of dilutive securities:
Stock options		—		—		—
Stock units		—		—		4
Average shares outstanding—diluted		178		181		190