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Costs and Estimated Earnings on Uncompleted Contracts (Tables)
 6 Months Ended
Jun. 30, 2013
Text Block [Abstract]  
Costs and Estimated Earnings on Uncompleted Contracts

Costs and estimated earnings on uncompleted contracts consist of (in millions):

 

     June 30,     December 31,  
     2013     2012  

Costs incurred on uncompleted contracts

    $ 6,942      $ 5,731   

Estimated earnings

      3,527        3,160   
  

 

 

    

 

 

  
     10,469        8,891   

Less: Billings to date

      10,180        8,855   
  

 

 

    

 

 

  
   $ 289      $ 36   
  

 

 

    

 

 

  

Costs and estimated earnings in excess of billings on uncompleted contracts

    $ 1,448      $ 1,225   

Billings in excess of costs and estimated earnings on uncompleted contracts

      (1,159 )      (1,189 ) 
  

 

 

    

 

 

  
   $ 289      $ 36