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Basis Of Presentation And Summary Of Significant Accounting Policies (Goodwill) (Narrative) (Details) - USD ($)
12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]      
Impairment of goodwill $ 0 $ 0 $ 0