Balance Sheet Details - Notes Payable and Short-Term Borrowings (Details) - USD ($) $ in Millions |
Apr. 30, 2018 |
Oct. 31, 2017 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Current portion of long-term debt | $ 2,997 | $ 3,005 |
| FS commercial paper | 432 | 401 |
| Notes payable to banks, lines of credit and other | 426 | 444 |
| Total | 3,855 | 3,850 |
| Financial Services | ||
| Debt Instrument [Line Items] | ||
| Notes payable to banks, lines of credit and other | $ 367 | $ 390 |