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Restructuring and Asset Impairment Charges (Tables)
6 Months Ended
Jun. 30, 2011
Restructuring and Asset Impairment Charges [Abstract]  
Restructuring and asset impairment charges
                                 
    Three Months     Six Months  
For the Periods Ended June 30   2011     2010     2011     2010  
Restructuring costs presented in costs of revenue
  $ 6     $     $ 6     $ 9  
Restructuring costs presented in operating expenses
    2       10       7       27  
Asset impairment
    1             1        
                                 
Total restructuring and asset impairment costs
  $ 9     $ 10     $ 14     $ 36