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Business Dispositions (Tables)
12 Months Ended
Dec. 31, 2011
BUSINESS DISPOSITIONS [Abstract]  
Discontinued operations income statement and balance sheet disclosures
                               
    Year Ended December 31
$ in millions   2011   2010   2009

Sales and service revenues

    $ 1,646       $ 6,711       $ 7,740  

Earnings from discontinued operations

      59         229         345  

Income tax expense

      (28 )       (95 )       (111 )

Earnings, net of tax

      31         134         234  

Gain on divestitures

      2         10         446  

Income tax (expense) benefit

      (1 )       5         (428 )

Gain on divestitures, net of tax

      1         15         18  

Earnings from discontinued operations, net of tax

    $ 32       $ 149       $ 252  
           
$ in millions     

Assets

         

Current assets

    $ 1,315  

Property, plant, and equipment, net

      1,997  

Goodwill

      1,141  

Other assets

      759  

Total assets of discontinued operations

    $ 5,212  
   

Liabilities

         

Trade accounts payable

    $ 274  

Other current liabilities

      955  

Current liabilities

      1,229  

Other liabilities

      1,563  

Total liabilities of discontinued operations

    $ 2,792