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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Aug. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amounts of the Company's intangible assets	$ 44.1		$ 44.3
Amortization expense for intangible assets	$ 1.2	$ 1.5

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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