Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2025

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):

	Second quarter ended June 30,				Six months ended June 30,
	2025		2024		2025		2024
Average shares outstanding – basic		259		180		259		179
Effect of dilutive securities:
Stock options		—		—		—		—
Stock units		1		1		1		—
Average shares outstanding – diluted		260		181		260		179