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Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Allowances for doubtful accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 143,722 $ 165,540 $ 176,805
Additions: Charged to Costs and Expenses 25,289 10,175 3,089
Deductions: Write-offs, Net of Recoveries (41,094) (31,993) (14,354)
Balance at End of Year 127,917 143,722 165,540
Valuation allowance for deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 208,810 219,891 246,344
Additions: Charged to Costs and Expenses 18,341 11,700 5,206
Deductions: Write-offs, Net of Recoveries (37,466) (22,781) (31,659)
Balance at End of Year 189,685 208,810 219,891
Reserve for supplier advance payments      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 65,885 65,885 65,885
Additions: Charged to Costs and Expenses 0 0 0
Deductions: Write-offs, Net of Recoveries (65,885) 0 0
Balance at End of Year $ 0 $ 65,885 $ 65,885