Segment Information - Schedule of Net Revenue by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Earnings (Loss) Before Taxes:
Total consolidated net revenue	$ 12,213	$ 9,136	$ 32,192	$ 24,617
Total Americas
Earnings (Loss) Before Taxes:
Total consolidated net revenue	5,346	4,742	13,723	11,435
United States
Earnings (Loss) Before Taxes:
Total consolidated net revenue	4,785	4,278	12,057	9,535
Americas excluding United States
Earnings (Loss) Before Taxes:
Total consolidated net revenue	561	464	1,666	1,900
Europe, Middle East and Africa
Earnings (Loss) Before Taxes:
Total consolidated net revenue	4,202	2,740	11,468	8,159
Asia Pacific and Japan
Earnings (Loss) Before Taxes:
Total consolidated net revenue	$ 2,665	$ 1,654	$ 7,001	$ 5,023

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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+ Details

- 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.

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+ Details