Supplementary Financial Information - Schedule of Net Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Disaggregation of Revenue [Line Items]
Total net revenue	$ 14,408	$ 13,220	$ 28,846	$ 26,724
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	5,857	5,793	11,435	11,312
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	4,971	4,393	10,196	9,147
Asia-Pacific and Japan
Disaggregation of Revenue [Line Items]
Total net revenue	$ 3,580	$ 3,034	$ 7,215	$ 6,265

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.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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