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Properties, Plants, and Equipment, Net (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Schedule of Properties, Plants, and Equipment, Net

 

December 31,    2014      2013  

Land and land rights, including mines*

    $ 548       $ 639   

Structures:

      

Alumina:

      

Alumina refining

      2,750         3,049   

Bauxite mining

      1,403         1,591   

Primary Metals:

      

Aluminum smelting

      3,725         3,863   

Power generation

      645         683   

Global Rolled Products

      1,276         1,256   

Engineered Products and Solutions*

      786         693   

Other

      715         755   
       11,300         11,890   

Machinery and equipment:

      

Alumina:

      

Alumina refining

      4,165         4,685   

Bauxite mining

      524         596   

Primary Metals:

      

Aluminum smelting

      7,210         7,674   

Power generation

      1,080         1,101   

Global Rolled Products

      5,333         5,374   

Engineered Products and Solutions*

      3,071         2,481   

Other

      820         859   
       22,203         22,770   

Less: accumulated depreciation, depletion, and amortization

     
 		 34,051
19,091		   
  		     
 		 35,299
19,227		   
  

Construction work-in-progress*

     
 		 14,960
1,466		   
  		     
 		 16,072
1,567		   
  
     $ 16,426       $ 17,639   
* As of December 31, 2014, these line items include amounts related to the acquisition of an aerospace business (see Note F).