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Share-based Compensation - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
Cost of Goods Sold or Selling, General and Administrative Expense      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 17 $ 19 $ 11
Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 12.2    
Number of shares available for grant (in shares) 3.4