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Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Long-Lived assets      
Gross Cost $ 19,174 $ 18,917  
Accumulated Amortization (15,254) (14,871)  
Net Cost 3,920 4,046  
Property, Plant and Equipment (Textual) [Abstract]      
Net Cost of assets under capital leases 7 10  
Depreciation charge 1,068 1,033 1,159
Capital investment funding 11 4 4
Reduction in depreciation charges due to public funding 12 13 22
Cash proceeds from sale of equipment 26 29 10
Land [Member]
      
Long-Lived assets      
Gross Cost 86 88  
Accumulated Amortization 0 0  
Net Cost 86 88  
Buildings [Member]
      
Long-Lived assets      
Gross Cost 955 989  
Accumulated Amortization (363) (345)  
Net Cost 592 644  
Facilities and Leasehold Improvements [Member]
      
Long-Lived assets      
Gross Cost 3,086 3,053  
Accumulated Amortization (2,479) (2,390)  
Net Cost 607 663  
Machinery and Equipment [Member]
      
Long-Lived assets      
Gross Cost 14,320 13,933  
Accumulated Amortization (11,828) (11,551)  
Net Cost 2,492 2,382  
Computer and Research and Development Equipment [Member]
      
Long-Lived assets      
Gross Cost 508 519  
Accumulated Amortization (444) (441)  
Net Cost 64 78  
Other tangible assets [Member]
      
Long-Lived assets      
Gross Cost 169 211  
Accumulated Amortization (140) (144)  
Net Cost 29 67  
Construction in progress [Member]
      
Long-Lived assets      
Gross Cost 50 124  
Accumulated Amortization 0 0  
Net Cost $ 50 $ 124