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Fair Value Measurments - Level 3 Roll (Tables)
3 Months Ended
Oct. 27, 2012
Fair Value Measurements [Abstract]  
Level 3 Reconciliation
          
  Fair Value Measurements Using Significant
  Unobservable Inputs (Level 3)
 Available-For-Sale      
 Debt Securities Other Investments   
 ARS  Private Equity Total
Beginning Balance at January 28, 2012$ 3,450  $1,604 $5,054
Redemptions  -   (831)  (831)
Total gains or (losses)         
Included in earnings (or changes in net assets)  -    (6)  (6)
Included in other comprehensive income  -    -   -
Ending Balance at October 27, 2012$3,450  $767 $4,217
          
          
          
  Fair Value Measurements Using Significant
  Unobservable Inputs (Level 3)
 Available-For-Sale      
 Debt Securities Other Investments   
 ARS  Private Equity Total
Beginning Balance at January 29, 2011$ 3,450  $1,925 $5,375
Total gains or (losses)         
Included in earnings (or changes in net assets)  -    (15)  (15)
Ending Balance at October 29, 2011$3,450  $1,910 $5,360