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Other Noncurrent Assets (Tables)
 12 Months Ended
Dec. 31, 2013
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]  
Schedule of Other Noncurrent Assets
December 31,    2013      2012  

Cash surrender value of life insurance

    $ 507       $ 464   

Intangibles, net (E)

      399         407   

Value-added tax receivable

      339         408   

Prepaid gas transmission contract (N)

      315         363   

Fair value of derivative contracts (X)

      220         364   

Deferred mining costs, net

      219         223   

Advance related to European Commission Matter in Italy (N)

      126         -   

Prepaid pension benefit (W)

      88         86   

Unamortized debt expense

      73         86   

Other

      342         311   
     $ 2,628       $ 2,712