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Costs and Estimated Earnings on Uncompleted Contracts (Tables)
 3 Months Ended
Mar. 31, 2016
Text Block [Abstract]  
Costs and Estimated Earnings on Uncompleted Contracts

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

 

     March 31,
2016		      December 31,
2015		  

Costs incurred on uncompleted contracts

    $ 9,139       $ 9,082   

Estimated earnings

      4,164         4,080   
  

 

 

     

 

 

  
     13,303         13,162   

Less: Billings to date

      12,967         12,697   
  

 

 

     

 

 

  
   $ 336       $ 465