Supplementary Financial Information - Government Assistance (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Capitalized Contract Cost [Line Items] | |||
| Government assistance recognized | $ 196 | $ 126 | $ 117 |
| Reduction of cost of net revenue | $ 130 | $ 111 | $ 95 |
| Government Assistance Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag | government assistance | government assistance | government assistance |
| Government Assistance, Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration] | Total cost of net revenue | Total cost of net revenue | Total cost of net revenue |
| Minimum | |||
| Capitalized Contract Cost [Line Items] | |||
| Grant agreements are usually for a period | 3 years | ||
| Maximum | |||
| Capitalized Contract Cost [Line Items] | |||
| Grant agreements are usually for a period | 5 years | ||