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Investments (Tables)
3 Months Ended
Mar. 31, 2025
Equity Method Investments and Joint Ventures [Abstract]  
Summary of Unaudited Financial Information for Alcoa Corporation's Equity Investments A summary of unaudited financial information for Alcoa Corporation’s equity investments is as follows (amounts represent 100% of investee financial information):

 

First quarter ended March 31, 2025

 

Saudi Arabia
Joint Venture

 

 

Mining

 

 

Energy

 

 

Other

 

Sales

 

$

956

 

 

$

168

 

 

$

58

 

 

$

111

 

Cost of goods sold

 

 

775

 

 

 

104

 

 

 

22

 

 

 

100

 

Net income (loss)

 

 

13

 

 

 

19

 

 

 

29

 

 

 

(10

)

Equity in net income (loss) of affiliated companies,
   before reconciling adjustments

 

 

3

 

 

 

9

 

 

 

11

 

 

 

(5

)

Other

 

 

6

 

 

 

 

 

 

 

 

 

(7

)

Alcoa Corporation’s equity in net income (loss) of
   affiliated companies

 

 

9

 

 

 

9

 

 

 

11

 

 

 

(12

)

 

 

 

 

 

 

 

 

 

 

 

 

 

First quarter ended March 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Sales

 

$

711

 

 

$

115

 

 

$

63

 

 

$

115

 

Cost of goods sold

 

 

599

 

 

 

103

 

 

 

25

 

 

 

105

 

Net (loss) income

 

 

(8

)

 

 

(5

)

 

 

31

 

 

 

(16

)

Equity in net (loss) income of affiliated companies,
   before reconciling adjustments

 

 

(2

)

 

 

(2

)

 

 

12

 

 

 

(8

)

Other

 

 

(8

)

 

 

 

 

 

(1

)

 

 

(5

)

Alcoa Corporation’s equity in net (loss) income of
   affiliated companies

 

 

(10

)

 

 

(2

)

 

 

11

 

 

 

(13

)