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Costs and Estimated Earnings on Uncompleted Contracts
 6 Months Ended
Jun. 30, 2015
Text Block [Abstract]  
Costs and Estimated Earnings on Uncompleted Contracts
5.   Costs and Estimated Earnings on Uncompleted Contracts

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

 

     June 30,
2015		      December 31,
2014		  

Costs incurred on uncompleted contracts

    $ 10,991       $ 10,442   

Estimated earnings

      4,910         4,699   
  

 

 

     

 

 

  
     15,901         15,141   

Less: Billings to date

      15,360         15,038   
  

 

 

     

 

 

  
   $ 541       $ 103   
  

 

 

     

 

 

  

Costs and estimated earnings in excess of billings on uncompleted contracts

    $ 1,810       $ 1,878   

Billings in excess of costs and estimated earnings on uncompleted contracts

      (1,269 )       (1,775 ) 
  

 

 

     

 

 

  
   $ 541       $ 103