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Fair Value Measurements (Tables)
3 Months Ended
Oct. 29, 2011
Summary of Financial Assets Measured at Fair Value on a Recurring Basis
The following table summarizes the Company’s financial assets measured at fair value on a recurring basis:

   
October 29,
2011
   
July 30,
2011
 
   
(millions)
 
Financial assets carried at fair value:
           
Municipal bonds(a)
  $ 179.4     $ 179.2  
Auction rate securities(b)
    8.9       12.0  
Total
  $ 188.3     $ 191.2  
 

 
(a)
Based on Level 1 measurements.
 
(b)
Based on Level 3 measurements.
Reconciliation of Beginning and Ending Balances of Investment Securities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)
The following table provides a reconciliation of the beginning and ending balances of the investment securities measured at fair value using significant unobservable inputs (Level 3):

   
Three Months Ended
 
Level 3 (Unobservable inputs)
 
October 29,
2011
   
October 30,
2010
 
   
(millions)
 
Balance at beginning of period
  $ 12.0     $ 22.7  
Change in temporary valuation adjustment included in other comprehensive income
    0.3       0.1  
Redemptions at par
    (3.4 )     (6.9 )
Balance at end of period
  $ 8.9     $ 15.9