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Restructuring Charges and Asset Impairments (Tables)
9 Months Ended
Jul. 31, 2011
Restructuring and Asset Impairments [Abstract]  
Changes in restructuring reserves related to severance
 
         
    Severance  
    (In millions)  
 
Balance, October 31, 2010
  $ 99  
Consumption of reserves
    (14 )
Adjustment of restructuring reserves
    (32 )
         
Balance, January 30, 2011
    53  
Consumption of reserves
    (7 )
Adjustment of restructuring reserves
    (28 )
         
Balance, May 1, 2011
    18  
Consumption of reserves
    (7 )
         
Balance, July 31, 2011
  $ 11