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Asset-Backed Securitization Program (Securitization Activity) (Details) - Asset-Backed Securitization Program - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Trade Accounts Receivable Securitization and Sale Program [Line Items]    
Trade accounts receivable sold $ 1,032 $ 1,173
Cash proceeds received 1,030 1,171
Pre-tax losses on sale of receivables $ 2 $ 2