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Income Taxes Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 3.9 | $ 4.5 | $ 3.7

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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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