Taxes on Earnings - Schedule of Deferred Tax Asset Valuation Allowance and Changes (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Movement in Valuation Allowances and Reserves | |||
| Balance at beginning of year | $ 6,688 | $ 6,994 | $ 7,592 |
| Income tax (benefit) expense | (230) | (300) | (650) |
| Goodwill, other comprehensive loss (income), currency translation and charges to other accounts | 21 | (6) | 52 |
| Balance at end of year | $ 6,479 | $ 6,688 | $ 6,994 |