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Shareholders' Equity (Tables)
 3 Months Ended
Oct. 31, 2012
Shareholders' Equity [Abstract]  
Effects of Changes in Ownership Interest in Subsidiaries
Effects of changes in E&E's ownership interest in its subsidiaries on E&E's equity:

 
Three months ended
October 31, 2012
   
Fiscal year ended
July 31, 2012
 
Transfers to noncontrolling interest:
             
Sale of 600 Gustavson common shares
$
---
   
$
41,634
 
Total transfers to noncontrolling interest
 
---
     
41,634
 
               
Transfers from noncontrolling interest:
             
Purchase of 152 Walsh common shares
 
---
     
(73,748
) 
Purchase of  496 Walsh common shares
 
---
     
(269,064
) 
Purchase of  5,389 Brazil common shares
 
---
     
77,539
 
Purchase of 26,482 Walsh Peru common shares
 
---
     
(213,917
)
Purchase of 166 Walsh common shares
 
---
     
(94,601
) 
Purchase of 25 Gestion Ambiental Consultores common shares
 
---
     
(7,452
)
Purchase of 75 Lowham common shares
 
(30,002
)
   
---
 
Total transfers from noncontrolling interest
 
(30,002
)
   
(581,243
)
               
Transfers to (from) noncontrolling interest
$
(30,002
)
 
$
(539,609
)