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Significant Accounting Policies - Assets Held For Sale (Details) - Held-for-sale - Building $ in Millions	12 Months Ended
	Aug. 31, 2022 USD ($) building	Aug. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings classified as held for sale | building	1
Assets held for sale, total		$ 6.6
Gain on sale of building	$ 2.3

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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