Balance Sheet Details - Schedule of Severance Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025	Oct. 31, 2025
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 38	$ 15	$ 120	$ 256	$ 418
Income Statement Location [Axis]: us-gaap:BusinessCombinationAcquisitionRelatedCosts
Restructuring Cost and Reserve [Line Items]
Severance costs	9	15	46	15
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
Restructuring Cost and Reserve [Line Items]
Severance costs	14	0	26	63
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Restructuring Cost and Reserve [Line Items]
Severance costs	0	0	7	31
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 15	$ 0	$ 41	$ 147

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details