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