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Earnings Per Share (Tables)
 6 Months Ended
Jun. 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):

 

 

 

Second quarter ended
June 30,

 

 

Six months ended
June 30,

 

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

Net income (loss) attributable to Alcoa Corporation

 

$

20

 

 

$

(102

)

 

$

(232

)

 

$

(333

)

Average shares outstanding – basic

 

 

180

 

 

 

178

 

 

 

179

 

 

 

178

 

Effect of dilutive securities:

 

 

 

 

 

 

 

 

 

 

 

 

Stock options

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Stock units

 

 

1

 

 

 

—

 

 

 

—

 

 

 

—

 

Average shares outstanding – diluted

 

 

181

 

 

 

178

 

 

 

179

 

 

 

178