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Revenue - Additional Information (Details)
$ in Millions
12 Months Ended
Aug. 31, 2021
USD ($)
Aug. 31, 2020
USD ($)
ExternalCustomer
Aug. 31, 2021
jointventureinterest
Aug. 31, 2021
Aug. 31, 2021
ExternalCustomer
Aug. 31, 2019
ExternalCustomer
Revenue From Contract With Customer [Abstract]            
Number of external customer that accounted more than 10% of consolidated revenues   0 1   0 0
Percentage of external customer that not accounted for consolidated revenues 10.00%          
Receivables from contracts with customers, net of allowance for credit losses $ 210 $ 135        
Percentage of receivables from contracts with customers of accounts receivable   97.00%   98.00%    
Contract liabilities 8 $ 8        
Contract liabilities reclassified to revenue $ 7 $ 3