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Income Taxes (Tax Years That Remain Subject To Examinations For Major Tax Jurisdictions) (Details)
12 Months Ended
Aug. 31, 2012
Canada [Member] | Minimum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2005
Canada [Member] | Maximum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2012
Australia [Member] | Minimum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2006
Australia [Member] | Maximum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2012
Japan, United Kingdom [Member] | Minimum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2007
Japan, United Kingdom [Member] | Maximum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2012
United States - State And Local Income Tax [Member] | Minimum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2008
United States - State And Local Income Tax [Member] | Maximum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2012
United States - Federal Income Tax [Member] | Minimum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2009
United States - Federal Income Tax [Member] | Maximum [Member]
 
Income Taxes [Line Items]  
Tax years that remain subject to examinations 2012