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Income Taxes (Details)
3 Months Ended 6 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2021
Feb. 29, 2020
Income Tax Disclosure [Abstract]        
U.S. federal statutory income tax rate 21.00% 21.00% 21.00% 21.00%
Effective income tax rate 26.90% 108.90% 28.50% 71.00%