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Segment Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 54,132	$ 54,015
Operating Segment | Compute
Segment Reporting Information [Line Items]
Assets	15,458	14,962
Operating Segment | HPC & MCS
Segment Reporting Information [Line Items]
Assets	5,957	6,245
Operating Segment | Storage
Segment Reporting Information [Line Items]
Assets	6,569	6,438
Operating Segment | Intelligent Edge
Segment Reporting Information [Line Items]
Assets	4,421	4,352
Operating Segment | Financial Services
Segment Reporting Information [Line Items]
Assets	14,433	14,765
Operating Segment | Corporate Investments and Other
Segment Reporting Information [Line Items]
Assets	1,163	1,124
Corporate and unallocated assets
Segment Reporting Information [Line Items]
Assets	$ 6,131	$ 6,129

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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