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Noncontrolling Interests (Tables)
12 Months Ended
Dec. 31, 2014
Noncontrolling Interest [Abstract]  
Schedule of Noncontrolling Shareholders' Interests

The following table summarizes the noncontrolling shareholders’ interests in the equity of certain Alcoa majority-owned consolidated subsidiaries:

 

December 31,    2014      2013  

Alcoa World Alumina and Chemicals

   $ 2,474       $ 2,896   

Other

     14         33   
     $ 2,488       $ 2,929