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Stock Compensation Plans (Tables) (Unaudited)
9 Months Ended
Sep. 30, 2011
STOCK COMPENSATION PLANS [Abstract] 
Assumptions relating to valuation of stock options
                 
     2011     2010  

Dividend yield

    2.7     2.9

Volatility rate

    25     25

Risk-free interest rate

    2.4     2.3

Expected option life (years)

    6       6  
Stock Option Rollforward Activity
                                 
    

Shares

under Option

(in thousands)

   

Weighted-

Average

Exercise
Price

   

Weighted-
Average

Remaining

Contractual
Term

   

Aggregate

Intrinsic
Value

($ in
millions)

 

Outstanding at January 1, 2011

    13,221       $55       3.8 years       $149  

Granted

    805       63                  

Exercised

    (2,277     44                  

Canceled and forfeited

    (86     57                  

Shipbuilding spin-off adjustments

    150       59                  

Outstanding at September 30, 2011

    11,813       $53       3.6 years       $ 48  

Vested and expected to vest in the future at September 30, 2011

    11,785       $53       3.6 years       $  48  

Exercisable at September 30, 2011

    9,028       $52       3.0 years       $  42  
Stock Award Rollforward Activity
                         
    

Stock

Awards

(in thousands)

   

Weighted-

Average

Grant Date

Fair Value

   

Weighted-

Average

Remaining

Contractual
Term

 

Outstanding at January 1, 2011

    4,300       $53       1.5 years  

Granted

    1,640       63          

Vested

    (56     65          

Forfeited

    (322     50          

Shipbuilding spin-off adjustments

    (252     47          

Outstanding at September 30, 2011

    5,310       $53       1.2 years