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Segment Information - Segment Operating Results from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting Information
Net revenue	$ 27,784	$ 26,982	$ 29,135
Segment earnings (loss) from operations	1,132	(329)	1,274
Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(503)	(598)	(615)
Operating segments
Segment Reporting Information
Net revenue	28,287	27,580	29,750
Segment earnings (loss) from operations	3,133	2,520	3,305
Compute
Segment Reporting Information
Net revenue	12,041	11,905	13,332
Compute | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(251)	(380)	(398)
Compute | Operating segments
Segment Reporting Information
Net revenue	12,292	12,285	13,730
Segment earnings (loss) from operations	1,326	1,007	1,719
HPC & AI
Segment Reporting Information
Net revenue	3,041	3,014	2,861
HPC & AI | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(147)	(91)	(122)
HPC & AI | Operating segments
Segment Reporting Information
Net revenue	3,188	3,105	2,983
Segment earnings (loss) from operations	234	285	365
Storage
Segment Reporting Information
Net revenue	4,681	4,592	5,183
Storage | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(82)	(93)	(72)
Storage | Operating segments
Segment Reporting Information
Net revenue	4,763	4,685	5,255
Segment earnings (loss) from operations	778	813	1,009
Intelligent Edge
Segment Reporting Information
Net revenue	3,277	2,838	2,901
Intelligent Edge | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(10)	(17)	(12)
Intelligent Edge | Operating segments
Segment Reporting Information
Net revenue	3,287	2,855	2,913
Segment earnings (loss) from operations	500	337	216
Financial Services
Segment Reporting Information
Net revenue	3,388	3,340	3,573
Financial Services | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	(13)	(12)	(8)
Financial Services | Operating segments
Segment Reporting Information
Net revenue	3,401	3,352	3,581
Segment earnings (loss) from operations	390	284	310
Corporate Investments and Other
Segment Reporting Information
Net revenue	1,356	1,293	1,285
Corporate Investments and Other | Elimination of intersegment net revenue
Segment Reporting Information
Net revenue	0	(5)	(3)
Corporate Investments and Other | Operating segments
Segment Reporting Information
Net revenue	1,356	1,298	1,288
Segment earnings (loss) from operations	$ (95)	$ (206)	$ (314)

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

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