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COMMON STOCK (Tables)
12 Months Ended
Jul. 31, 2011
Common Stock (Tables) [Abstract]  
Schedule of Share Based Compensation Components of stock-based compensation expense
 Schedule of  Share Based Compensation Components of stock-based compensation expense

      July 31, 2011       July 31, 2010       July 31, 2009
Restricted stock units   $ 12,651   $ 11,314   $ 10,136
Stock options     5,298     4,849     4,627
Employee stock purchase plan (“ESPP”)     4,527     4,488     4,939
Management stock purchase plan (“MSPP”)     3,957     3,965     3,782
       Total   $        26,433   $        24,616   $        23,484
  
Income tax effects related to stock-based compensation
Income tax effects related to stock-based compensation
        2011       2010       2009
Excess tax benefits in cash flows from                  
       financing activities   $ 12,777   $ 2,671   $ 457
Tax benefit recognized related to                  
       total stock-based compensation expense     8,457     7,159     6,288
Actual tax benefit realized for tax deductions                  
       from option exercises of stock-based                  
       payment arrangements            23,074            8,301            3,949
  
Valuation of Stock options
Valuation of Stock options & ESPP Shares
 
        2011       2010       2009
Stock Options                        
Weighted average fair value at                        
       grant date   $        15.78     $        10.44     $        6.79  
Valuation assumptions:                        
       Expected dividend yield     1.9 %     2.0 %     1.8 %
       Expected volatility     36.8 %     35.2 %     31.9 %
       Expected life (years)     5       5       5  
       Risk-free interest rate     1.8 %     2.2 %     1.8 %
Valuation of ESPP Shares
Valuation of ESPP Shares

              
        2011       2010          2009
ESPP Shares                        
Weighted average fair value at                        
       grant date   $        11.66     $        8.28     $        7.99  
Valuation assumptions:                        
       Expected dividend yield     1.5 %     1.9 %     1.9 %
       Expected volatility     31.4 %     31.3 %             56.1 %
       Expected life (years)   ½ year       ½ year     ½ year  
       Risk-free interest rate     0.1 %     0.2 %     0.7 %

Summary of MSPP Activity
Summary of MSPP Activity
       2011      2010      2009
Deferred compensation and cash         
       contributions $4,351 $3,232 $5,382
Fair value of restricted stock units vested $       4,095 $       3,853 $       1,757
Vested units distributed  176  200  158
Summary Of Restricted Stock Unit Activity, Excluding Annual Award Units
Summary Of Restricted Stock Unit Activity, Excluding Annual Award Units

 
        Weighted-
        Average
        Grant-Date
        Shares       Fair Value
Nonvested at August 1, 2010             1,232     $           35.38
       Granted   235       55.31
       Vested   (191 )     44.10
       Forfeited   (57 )     34.01
Nonvested at July 31, 2011   1,219     $           37.92
 


Summary Of Option Activity For All Stock Option Plans
Summary Of Option Activity For All Stock Option Plans

          Weighted-   Weighted-      
          Average   Average   Aggregate
          Exercise   Remaining   Intrinsic
Options       Shares       Price       Contractual Term       Value
Outstanding at August 1, 2010   3,849     $ 29.75          
       Granted   216       54.94          
       Exercised          (1,555 )     26.67          
       Forfeited or Expired   (67 )     27.31          
Outstanding at July 31, 2011   2,443     $ 34.01   4.0        $        39,203
Expected to vest at July 31, 2011   1,028     $          37.89   5.3   $        13,116
Exercisable at July 31, 2011   1,386     $ 30.94   3.0   $        25,824