Segment Information - Schedule of Segment Operating Results from Continuing Operations (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 segment net revenue	$ 10,678	$ 7,627	$ 19,979	$ 15,481
Segment earnings (loss) from operations	747	(1,109)	1,217	(676)
Operating Segment
Earnings (Loss) Before Taxes:
Total segment net revenue	10,678	7,627	19,979	15,481
Segment cost of sales	6,741	5,386	12,638	10,927
Segment operating expenses	2,411	1,563	4,542	3,017
Segment earnings (loss) from operations	1,526	678	2,799	1,537
Networking
Earnings (Loss) Before Taxes:
Total segment net revenue	2,690	1,084	5,396	2,160
Networking \| Operating Segment
Earnings (Loss) Before Taxes:
Total segment net revenue	2,690	1,084	5,396	2,160
Segment cost of sales	1,056	422	2,105	817
Segment operating expenses	1,053	391	2,070	752
Segment earnings (loss) from operations	581	271	1,221	591
Cloud & AI
Earnings (Loss) Before Taxes:
Total segment net revenue	7,707	6,271	14,041	12,782
Cloud & AI \| Operating Segment
Earnings (Loss) Before Taxes:
Total segment net revenue	7,707	6,271	14,041	12,782
Segment cost of sales	5,468	4,760	10,112	9,704
Segment operating expenses	1,285	1,097	2,330	2,117
Segment earnings (loss) from operations	954	414	1,599	961
Corporate Investments and Other
Earnings (Loss) Before Taxes:
Total segment net revenue	281	272	542	539
Corporate Investments and Other \| Operating Segment
Earnings (Loss) Before Taxes:
Total segment net revenue	281	272	542	539
Segment cost of sales	217	204	421	406
Segment operating expenses	73	75	142	148
Segment earnings (loss) from operations	$ (9)	$ (7)	$ (21)	$ (15)

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

The net result for the period of deducting operating expenses from operating revenues.

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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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