Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 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):

	Second quarter ended June 30,					Six months ended June 30,
	2023			2022		2023			2022
Net (loss) income attributable to Alcoa Corporation	$	(102	)	$	549	$	(333	)	$	1,018
Average shares outstanding – basic		178			182		178			183
Effect of dilutive securities:
Stock options		—			—		—			—
Stock units		—			4		—			4
Average shares outstanding – diluted		178			186		178			187