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Note 10. Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years 255 days
Amortization of Intangible Assets	$ 1.9	$ 1.9

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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