Supplementary Financial Information - Schedule of Net Revenue by Region (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	$ 55,295	$ 53,559	$ 53,718
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	23,545	23,251	23,095
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	18,596	18,044	17,819
Asia-Pacific and Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	$ 13,154	$ 12,264	$ 12,804