Income Taxes (Tax Years That Remain Subject To Examinations For Major Tax Jurisdictions) (Details)	12 Months Ended
	Aug. 31, 2016
Canada [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2009
Canada [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2016
Australia [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2009
Australia [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2016
Japan, United Kingdom [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2011
Japan, United Kingdom [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2016
United States - State And Local Income Tax [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2012
United States - State And Local Income Tax [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2016
United States - Federal Income Tax [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2013
United States - Federal Income Tax [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax years that remain subject to examinations	2016