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Business Combinations (Tables)
 9 Months Ended
Apr. 30, 2011
Business Combinations  
Summary of Purchase Acquisitions
     Shares Issued      Purchase
Consideration		      Net
Liabilities
Assumed		     Purchased
Intangible
Assets		      Goodwill  

Total acquisitions

      —         $ 288       $ (10 )   $ 114       $ 184