Segment Information - Schedule of Net Revenue by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Earnings (Loss) Before Taxes:
Total consolidated net revenue	$ 10,678	$ 7,627	$ 19,979	$ 15,481
Total Americas
Earnings (Loss) Before Taxes:
Total consolidated net revenue	4,554	3,301	8,377	6,693
United States
Earnings (Loss) Before Taxes:
Total consolidated net revenue	3,952	2,739	7,272	5,257
Americas excluding United States
Earnings (Loss) Before Taxes:
Total consolidated net revenue	602	562	1,105	1,436
Europe, Middle East and Africa
Earnings (Loss) Before Taxes:
Total consolidated net revenue	3,779	2,739	7,266	5,419
Asia Pacific and Japan
Earnings (Loss) Before Taxes:
Total consolidated net revenue	$ 2,345	$ 1,587	$ 4,336	$ 3,369

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