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SHARE-BASED AND OTHER COMPENSATION, RSU Activity (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 24, 2021
Sep. 30, 2021
USD ($)
$ / shares
Sep. 30, 2020
USD ($)
$ / shares
Sep. 30, 2019
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock split ratio 1.5      
Stock dividend percentage 50.00%      
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant date fair value per unit award | $ / shares   $ 63.86 $ 58.20 $ 51.15
Total fair value of shares and RSU awards vested | $   $ 87 $ 83 $ 63