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Accrued Expenses (Accrued Expenses) (Details) - USD ($)
$ in Thousands
6 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Aug. 31, 2020
Accrued Liabilities, Current [Abstract]      
Contract liabilities $ 524,053   $ 496,219
Accrued compensation and employee benefits 666,808   703,250
Other accrued expenses 1,846,297   2,012,059
Accrued expenses 3,037,158   $ 3,211,528
Revenue recognized during period that was included in contract liability balance $ 233,300 $ 201,100