SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020	Sep. 01, 2019
Operating assets	$ 112,202	$ 114,905
Total operating lease liabilities	119,842	123,414
Retained earnings	$ 2,162,925	$ 1,807,826
Receivables secured by credit insurance or letters of credit
Percentage of accounts receivable secured by credit insurance or letters of credit	17.00%	13.00%
Accounting Standards Update 2016-02 | Other Noncurrent Assets
Operating assets			$ 113,400
Accounting Standards Update 2016-02 | Accrued Expenses and Other Payables
Total operating lease liabilities			30,900
Accounting Standards Update 2016-02 | Other Long-term Liabilities
Total operating lease liabilities			$ 84,900