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Costs and Estimated Earnings on Uncompleted Contracts
 3 Months Ended
Mar. 31, 2012
Costs and Estimated Earnings on Uncompleted Contracts [Abstract]  
Costs and Estimated Earnings on Uncompleted Contracts

4. Costs and Estimated Earnings on Uncompleted Contracts

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

 

 

                 
    March 31,     December 31,  
    2012     2011  

Costs incurred on uncompleted contracts

   $ 5,868     $ 5,839  

Estimated earnings

     3,630       3,775  
   

 

 

    

 

 

  
      9,498       9,614  

Less: Billings to date

     9,653       9,886  
   

 

 

    

 

 

  
    $ (155 )    $ (272 ) 
   

 

 

    

 

 

  

Costs and estimated earnings in excess of billings on uncompleted contracts

   $ 810     $ 593  

Billings in excess of costs and estimated earnings on uncompleted contracts

     (965 )      (865 ) 
   

 

 

    

 

 

  
    $ (155 )    $ (272 )