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Stockholders' Equity - Restricted Stock and SARS Information (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Share-Based Payment Arrangement [Abstract]      
Intrinsic value of SARS exercised $ 0 $ 0 $ 2
Fair value of restricted stock units vested 72 69 56
Tax benefit for stock compensation expense 2 $ 1 $ 1
Unrecognized stock-based compensation expense — restricted stock units $ 34    
Remaining weighted-average period for restricted stock units expense 1 year 4 months 24 days