Trade Accounts Receivable Sale Programs (Trade Accounts Receivable Sale Programs Amounts Recognized) (Details) - Trade Accounts Receivable Sale Programs - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Feb. 28, 2022 |
Feb. 28, 2021 |
Feb. 28, 2022 |
Feb. 28, 2021 |
|
| Trade Accounts Receivable Securitization and Sale Program [Line Items] | ||||
| Trade accounts receivable sold | $ 1,966 | $ 1,335 | $ 3,934 | $ 2,552 |
| Cash proceeds received | 1,965 | 1,334 | 3,932 | 2,550 |
| Pre-tax losses on sale of receivables | $ 1 | $ 1 | $ 2 | $ 2 |