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Contracts in Process (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 24, 2010
Sep. 24, 2010
Sep. 30, 2011
Dec. 31, 2010
Components of contracts in process     
Unbilled contract receivables, gross$ 2,887  $ 2,887$ 2,769
Unliquidated progress payments(1,033)  (1,033)(1,007)
Unbilled contract receivables, net1,854  1,8541,762
Inventoried contract costs, gross1,046  1,046882
Unliquidated progress payments(117)  (117)(96)
Inventoried contract costs, net929  929786
Total contracts in process2,783[1]  2,783[1]2,548
General & Administrative, Independent Research & Development and Bid and Proposal Costs     
Amounts included in inventoried contract costs at beginning of the period112937797 
Add: IRAD and B&P costs8887260267 
Other G&A costs238245727711 
Total contract costs incurred326332987978 
Less: Amounts charged to cost of sales(332)(317)(956)(969) 
Amounts included in inventoried contract costs at end of the period106108108106 
Selling, general and administrative expenses and research and development expenses     
Selling, general and administrative expenses6768200219 
Research and development expenses19195157 
Total$ 86$ 87$ 251$ 276 
[1]Unaudited