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Division Consolidation Costs (Tables)
3 Months Ended
Apr. 30, 2011
Division Consolidation Costs  
Activity Associated with Severance Accrual Established in Connection with Division Consolidation and Localization Initiative
     January 30,
2010
     Payments     May 1,
2010
 
     (millions)  

Severance costs

   $ 69       $ (49   $ 20